April 2008 Archives by author
Starting: Tue Apr 1 01:32:04 CEST 2008
Ending: Wed Apr 30 22:20:00 CEST 2008
Messages: 278
- a graph puzzle
Max Alekseyev
- integer quadruples with all pairwise distances being squares
Max Alekseyev
- integer quadruples with all pairwise distances being squares
Max Alekseyev
- Proof
Max Alekseyev
- Primes of both forms 24n+7 and 7m+24
Max Alekseyev
- Primes of both forms 24n+7 and 7m+24
Max Alekseyev
- Primes x^2+m y^2
Max Alekseyev
- Present the even number (if it divides by 4) as a difference of two integer squares ?
Max Alekseyev
- Quadratic forms vs congruences
Max Alekseyev
- Quadratic forms vs congruences
Max Alekseyev
- Primes Produced by Quadratic Forms
Max Alekseyev
- Primes Produced by Quadratic Forms
Max Alekseyev
- Primes Produced by Quadratic Forms
Max Alekseyev
- factorable trinomials
Max Alekseyev
- factorable trinomials
Max Alekseyev
- Parity of number "r" of representations of "n" as x^2+5y^2.
Max Alekseyev
- Parity of number "r" of representations of "n" as x^2+5y^2.
Max Alekseyev
- Two seq for the OEIuS
Eric Angelini
- 10-direction clock
Eric Angelini
- possible error in A005835
Joerg Arndt
- possible error in A005835
Joerg Arndt
- Permutation? Floor Of Ratio Of Adjacent Terms = 2
Joerg Arndt
- greedy computation of pseudoperfect numbers?
Joerg Arndt
- greedy computation of pseudoperfect numbers?
Joerg Arndt
- trivial dup: A137311 == A137312
Joerg Arndt
- Queneau-Daniel permutation and type-2 ONB
Joerg Arndt
- Queneau-Daniel permutation and type-2 ONB
Joerg Arndt
- odd n without prime factors 4k+3 s.t. x^2-n*y^2=-1 has no solutions
Joerg Arndt
- A014106(n)=-A110325(n+1)
Artur
- Two seq for the OEIuS
Artur
- A076937=A014682
Artur
- differences between A031398 and A137352
Artur
- Yesterday problem with ONEIS
Artur
- A139074: a(n)=least prime s.t. (n+p!)/n is prime
Artur
- Next fault
Artur
- A139074 or 0 if no such prime exists.
Artur
- Title A107006
Artur
- Title A107006
Artur
- Proof
Artur
- Primes of both forms 24n+7 and 7m+24
Artur
- Primes x^2+m y^2
Artur
- A106930 also primes x^2+63y^2
Artur
- [Fwd: SEQ+# A139490 FROM Artur Jasinski]
Artur
- Primes Produced by Quadratic Forms
Artur
- A139512: Mod[a(n),12]=1
Artur
- A139490
Artur
- OEIS index: almost prime gaps, quad form primes
Artur
- 4x^2 -4xy + 7y^2 Problem
Artur
- Q: OEIS duplicates?
Artur
- conjecture: if p is prime, the no. of rings of order p^2 is 11
Christian G. Bower
- New Seq: Differences between squares are cubes
Jack Brennen
- Average Of Changes Between Number Of Divisors
Jack Brennen
- Sum of prime rereciprocals?
David W. Cantrell
- Sum of prime rereciprocals?
David W. Cantrell
- conjecture: if p is prime, the no. of rings of order p^2 is 11
Edwin Clark
- A000040|A014686
Eric DESBIAUX
- A072752,A001348,A100105
Eric
- A026467|A113626
Eric
- A000040|A014686
Eric
- conjecture: if p is prime, the no. of rings of order p^2 is 11
Neil Fernandez
- conjecture: if p is prime, the no. of rings of order p^2 is 11
Neil Fernandez
- conjecture: if p is prime, the no. of rings of order p^2 is 11
Neil Fernandez
- When d(m) = d(m+n) = n
Martin Fuller
- No subject
Richard Guy
- Primes Produced by Quadratic Forms
David Harden
- Hypertribonacci number array has 6 existing OEIS seqs as rows and columns
Mitch Harris
- Fwd: b033274.txt
Maximilian Hasler
- a graph puzzle
Maximilian Hasler
- references for Sindx_Cy
Maximilian Hasler
- Fwd: Prime Hyperfibonacci numbers
Maximilian Hasler
- possible error in A005835
Maximilian Hasler
- 2^k - 2m+1 = prime: (Was: Sum Of Primes Is Power Of Primes: Question)
Maximilian Hasler
- Sum Of Primes Is Power Of Primes: Question
Maximilian Hasler
- 2^k - 2m+1 = prime: (Was: Sum Of Primes Is Power Of Primes: Question)
Maximilian Hasler
- COMMENT from M. F. Hasler on A096502
Maximilian Hasler
- A136141=A053778(?)
Maximilian Hasler
- Permutation? Floor Of Ratio Of Adjacent Terms = 2
Maximilian Hasler
- greedy computation of pseudoperfect numbers?
Maximilian Hasler
- greedy computation of pseudoperfect numbers?
Maximilian Hasler
- seq. of primes related to Erdös' conjecture
Maximilian Hasler
- greedy computation of pseudoperfect numbers?
Maximilian Hasler
- greedy computation of pseudoperfect numbers?
Maximilian Hasler
- COMMENT FROM M. F. Hasler RE A001045
Maximilian Hasler
- COMMENT FROM M. F. Hasler RE A007918
Maximilian Hasler
- Fwd: COMMENT FROM M. F. Hasler RE A007918
Maximilian Hasler
- greedy computation of pseudoperfect numbers?
Maximilian Hasler
- 5 sequences just differing by offset
Maximilian Hasler
- New Seq: Differences between squares are cubes
Maximilian Hasler
- A single integer N = a complete chess game
Maximilian Hasler
- New Seq: Differences between squares are cubes
Maximilian Hasler
- A single integer N = a complete chess game
Maximilian Hasler
- A single integer N = a complete chess game
Maximilian Hasler
- problem defining A117216
Maximilian Hasler
- A137365: correct terms?
Maximilian Hasler
- A single integer N = a complete chess game
Maximilian Hasler
- A110907 has been deleted
Maximilian Hasler
- A single integer N = a complete chess game
Maximilian Hasler
- Fwd: A single integer N = a complete chess game
Maximilian Hasler
- COMMENT FROM M. F. Hasler RE A037916
Maximilian Hasler
- conjecture: if p is prime, the no. of rings of order p^2 is 11
Maximilian Hasler
- A single integer N = a complete chess game
Maximilian Hasler
- A112773 vs A116944 ? - both have same terms (except that A116944 has two extra initial terms)
Maximilian Hasler
- COMMENT FROM M. F. Hasler RE A037916
Maximilian Hasler
- PRE-NUMBERED NEW SEQUENCE A139393 FROM M. F. Hasler
Maximilian Hasler
- Attn. Eric
Maximilian Hasler
- When d(m) = d(m+n) = n
Maximilian Hasler
- When d(m) = d(m+n) = n
Maximilian Hasler
- Average Of Changes Between Number Of Divisors
Maximilian Hasler
- Concatenation problem
Maximilian Hasler
- 10-direction clock
Maximilian Hasler
- Title A107006
Maximilian Hasler
- %C A136296 "Special augmented numbers" from Zak Seidov
Maximilian Hasler
- %C A136296 "Special augmented numbers" from Zak Seidov
Maximilian Hasler
- %C A136296 "Special augmented numbers" from Zak Seidov
Maximilian Hasler
- A106930 also primes x^2+63y^2
Maximilian Hasler
- primes = 1 mod 6: comments & potential new seq
Maximilian Hasler
- A000040|A014686
Maximilian Hasler
- hard or easy ? more, please...
Maximilian Hasler
- hard or easy ? more, please...
Maximilian Hasler
- A000040|A014686
Maximilian Hasler
- lost submissions to OEIS
Maximilian Hasler
- EDITED A104732
Maximilian Hasler
- A136611 = wrong version of A058009
Maximilian Hasler
- Primes of the form semiprime(a)^semiprime(a) + semiprime(b)^semiprime(b).
Maximilian Hasler
- Permutation
Maximilian Hasler
- A137389
Maximilian Hasler
- Q: OEIS duplicates?
Maximilian Hasler
- Q: OEIS duplicates?
Maximilian Hasler
- A135667 A028391
Maximilian Hasler
- Attempted Proof of a Recent-Sequence Conjecture [A136404]
Hans Havermann
- A single integer N = a complete chess game
Hans Havermann
- A single integer N = a complete chess game
Hans Havermann
- Triangle
Gottfried Helms
- Triangle
Gottfried Helms
- Triangle
Gottfried Helms
- Triangle
Gottfried Helms
- Triangle
Gottfried Helms
- Triangle
Gottfried Helms
- Triangle
Gottfried Helms
- Triangle
Gottfried Helms
- Permutation? Floor Of Ratio Of Adjacent Terms = 2
Robert Israel
- 10-direction clock
Robert Israel
- A137316 (group automorphisms)
Benoît Jubin
- prime Hyperfibonacci numbers
Lallouet
- Splitting of sequences
Lallouet
- greedy computation of pseudoperfect numbers?
Richard Mathar
- New Seq: Differences between squares are cubes
Richard Mathar
- New Seq: Differences between squares are cubes
Richard Mathar
- A089218 vs A052195
Richard Mathar
- problem defining A117216
Richard Mathar
- A089220: Missed and more terms(?)
Richard Mathar
- A137365: correct terms?
Richard Mathar
- Triangle
Richard Mathar
- Triangle
Richard Mathar
- conjecture: if p is prime, the no. of rings of order p^2 is 11
Richard Mathar
- integer quadruples with all pairwise distances being squares
Richard Mathar
- A026467|A113626
Richard Mathar
- integer quadruples with all pairwise distances being squares
Richard Mathar
- verifying A135581
Richard Mathar
- verifying A135581
Richard Mathar
- A139074 or 0 if no such prime exists.
Richard Mathar
- Proof
Richard Mathar
- Proof
Richard Mathar
- Present the even number (if it divides by 4) as a difference of two integer squares ?
Richard Mathar
- A120331 duplicates A038883 ?
Richard Mathar
- Q: OEIS duplicates?
Richard Mathar
- A135667 A028391
Richard Mathar
- Primes of both forms 24n+7 and 7m+24
Brendan McKay
- Proof
Graeme McRae
- Proof
Graeme McRae
- EDITED A104732
Alec Mihailovs
- hard or easy ? more, please...
Jim Nastos
- greedy computation of pseudoperfect numbers?
T. D. Noe
- Quadratic forms vs congruences
T. D. Noe
- Primes Produced by Quadratic Forms
T. D. Noe
- Prime Hyperfibonacci numbers
Jonathan Post
- Prime Hyperfibonacci numbers
Jonathan Post
- greedy computation of pseudoperfect numbers?
Jonathan Post
- greedy computation of pseudoperfect numbers?
Jonathan Post
- A single integer N = a complete chess game
Jonathan Post
- Hypertribonacci number array has 6 existing OEIS seqs as rows and columns
Jonathan Post
- Primes of the form semiprime(a)^semiprime(a) + semiprime(b)^semiprime(b).
Jonathan Post
- A112773 vs A116944 ? - both have same terms (except that A116944 has two extra initial terms)
Alexander Povolotsky
- %C A136296 "Special augmented numbers" from Zak Seidov
Alexander Povolotsky
- %C A136296 "Special augmented numbers" from Zak Seidov
Alexander Povolotsky
- Present the even number (if it divides by 4) as a difference of two integer squares ?
Alexander Povolotsky
- A000040|A014686
Alexander Povolotsky
- A137389
Alexander Povolotsky
- Sum Of Primes Is Composite
Leroy Quet
- Sum Of Primes Is Power Of Primes: Question
Leroy Quet
- 2^k - 2m+1 = prime: (Was: Sum Of Primes Is Power Of Primes: Question)
Leroy Quet
- 2^k - 2m+1 = prime & Sum Of Primes Is Power Of Primes: Question
Leroy Quet
- Permutation? Floor Of Ratio Of Adjacent Terms = 2
Leroy Quet
- When d(m) = d(m+n) = n
Leroy Quet
- When d(m) = d(m+n) = n
Leroy Quet
- When d(m) = d(m+n) = n
Leroy Quet
- lost submissions to OEIS
Leroy Quet
- Q: OEIS duplicates?
Leroy Quet
- Two primes sum to a factorial
Leroy Quet
- Two primes sum to a factorial
Leroy Quet
- definition of A107006
Don Reble
- New Seq: Differences between squares are cubes
Warut Roonguthai
- New Seq: Differences between squares are cubes
Warut Roonguthai
- Proof
Warut Roonguthai
- is this sequence interesting?
Rainer Rosenthal
- Sum of prime rereciprocals?
Rainer Rosenthal
- integer quadruples with all pairwise distances being squares
Rainer Rosenthal
- Sequence in context
Rainer Rosenthal
- 10-direction clock
Rainer Rosenthal
- 10-direction clock
Rainer Rosenthal
- Two seq for the OEIuS
N. J. A. Sloane
- greedy computation of pseudoperfect numbers?
N. J. A. Sloane
- Queneau-Daniel permutation and type-2 ONB
N. J. A. Sloane
- A110907 has been deleted
N. J. A. Sloane
- Title A107006
N. J. A. Sloane
- A139074 or 0 if no such prime exists.
N. J. A. Sloane
- Proof
N. J. A. Sloane
- lost submissions to OEIS
N. J. A. Sloane
- lost submissions to OEIS
N. J. A. Sloane
- Sum of prime rereciprocals?
N. J. A. Sloane
- A072752,A001348,A100105
N. J. A. Sloane
- Using Subject lines properly when sending me email
N. J. A. Sloane
- A137389
N. J. A. Sloane
- sequences involving differences between 2 cubes
N. J. A. Sloane
- A single integer N = a complete chess game
Ralf Stephan
- OT: Re: A single integer N = a complete chess game
Ralf Stephan
- The Bell system
Russell Walsmith
- A single integer N = a complete chess game
Andrew Weimholt
- possible error in A005835
David Wilson
- 2^k - 2m+1 = prime: (Was: Sum Of Primes Is Power Of Primes: Question)
David Wilson
- A single integer N = a complete chess game
David Wilson
- conjecture: if p is prime, the no. of rings of order p^2 is 11
David Wilson
- Fw: can you help ?
David Wilson
- No subject
David Wilson
- 4x^2 -4xy + 7y^2 Problem
David Wilson
- Sum of prime rereciprocals?
David W. Wilson
- A single integer N = a complete chess game
David W. Wilson
- Sum of prime rereciprocals?
David W. Wilson
- Sum of prime rereciprocals?
David W. Wilson
- A single integer N = a complete chess game
David W. Wilson
- Attn. Eric
David W. Wilson
- Concatenation problem
David W. Wilson
- Concatenation problem
David W. Wilson
- Primes of both forms 24n+7 and 7m+24
David W. Wilson
- Proof
David W. Wilson
- Interesting quintuple of primes.
David W. Wilson
- Prime Hyperfibonacci numbers
Joshua Zucker
- greedy computation of pseudoperfect numbers?
Joshua Zucker
- Parity of number "r" of representations of "n" as x^2+5y^2.
Joshua Zucker
- GO Sequence
koh
- Permutation
koh
- Edited A137606
koh
- Semi Integer Multiply Perfect
koh
- Any Composites? (Regarding n*k +1, n*k -1)
drew at math.mit.edu
- A139074 or 0 if no such prime exists.
drew at math.mit.edu
- A139074 or 0 if no such prime exists.
drew at math.mit.edu
- Sum of prime rereciprocals?
sellersj at math.psu.edu
- possible error in A005835
franktaw at netscape.net
- Sum Of Primes Is Power Of Primes: Question
franktaw at netscape.net
- Permutation? Floor Of Ratio Of Adjacent Terms = 2
franktaw at netscape.net
- greedy computation of pseudoperfect numbers?
franktaw at netscape.net
- greedy computation of pseudoperfect numbers?
franktaw at netscape.net
- New Seq: Differences between squares are cubes
franktaw at netscape.net
- COMMENT FROM M. F. Hasler RE A037916
franktaw at netscape.net
- Sequence in context
franktaw at netscape.net
- A139074 or 0 if no such prime exists.
franktaw at netscape.net
- %C A136296 "Special augmented numbers" from Zak Seidov
franktaw at netscape.net
- %C A136296 "Special augmented numbers" from Zak Seidov
franktaw at netscape.net
- Primes of both forms 24n+7 and 7m+24
franktaw at netscape.net
- b033274.txt
zak seidov
- New Seq: Differences between squares are cubes
zak seidov
- A089218 vs A052195
zak seidov
- A137365: correct terms?
zak seidov
- A089220: Missed and more terms(?)
zak seidov
- %C A136296 "Special augmented numbers" from Zak Seidov
zak seidov
- Primes of both forms 24n+7 and 7m+24
zak seidov
- Primes of both forms 24n+7 and 7m+24
zak seidov
- A139512: Mod[a(n),12]=1
zak seidov
Last message date:
Wed Apr 30 22:20:00 CEST 2008
Archived on: Sun Jan 15 12:28:14 CET 2023
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