August 2008 Archives by thread

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Starting: Fri Aug 1 00:18:25 CEST 2008
Ending: Fri Aug 29 21:11:03 CEST 2008
Messages: 101

Question about A023394 Max Alekseyev
Hamiltonian cycles on square grids. Max Alekseyev
- Hamiltonian cycles on square grids. N. J. A. Sloane
Witt transform examples in the OEIS Christian G. Bower
Scatterplot Question Robert Israel
- Scatterplot Question franktaw at netscape.net
not solved problem Lallouet
- not solved problem Lallouet
unsolved problem Lallouet
A122527 and A121231 (number of binary matrices) Richard Mathar
- A122527 and A121231 (number of binary matrices) Rob Pratt
  - A122527 and A121231 (number of binary matrices) Rob Pratt
Intriguing property of sequence A111698 Diana Mecum
K_4-free graphs David Garber
- K_4-free graphs Max Alekseyev
  - Grand Tour Puzzles Tanya Khovanova
New web page for adding something, including more terms N. J. A. Sloane
- New web page for adding something, including more terms N. J. A. Sloane
Sum of reciprocals of double factorials Max Alekseyev
- Sum of reciprocals of double factorials Max Alekseyev
  - Sum of reciprocals of double factorials Jonathan Post
    - Sum of reciprocals of double factorials Jonathan Post
    - Sum of reciprocals of double factorials Eric W. Weisstein
    - Sum of reciprocals of double factorials Jonathan Post
    - Sum of reciprocals of double factorials Jonathan Post
Asymptote of A003242 hv at crypt.org
- Asymptote of A003242 Alec Mihailovs
- Asymptote of A003242 Christian G. Bower
questions on A118960, primes as partitions of 2+1/2 Richard Mathar
A064371 and A105272 are duplicates Alexander Povolotsky
Does any "n" exist, such that ( n! + prime(n) ) yields integral square ? Alexander Povolotsky
- Does any "n" exist, such that ( n! + prime(n) ) yields integral square ? Alexander Povolotsky
Re: Does any "n" exist, such that ( n! + prime(n) ) yields integral square ?‏ David Harden
number of Hi-Lo arrangements Max Alekseyev
Possibly interesting sequence David Wilson
- Possibly interesting sequence Max Alekseyev
  - Possibly interesting sequence David Wilson
    - Possibly interesting sequence Reinhard Zumkeller
    - Possibly interesting sequence T. D. Noe
- {Spam?} Re: Possibly interesting sequence Don Reble
- Possibly interesting sequence franktaw at netscape.net
Does then NO "n" exist, such that ( n! + prime(n) ) yields integral m^k where k>1 ? Alexander Povolotsky
- Does then NO "n" exist, such that ( n! + prime(n) ) yields integral m^k where k>1 ? Alexander Povolotsky
  - Does then NO "n" exist, such that ( n! + prime(n) ) yields integral m^k where k>1 ? Alexander Povolotsky
Array generalizing A031165 Jonathan Post
- Array generalizing A031165 Alexander Povolotsky
- Array generalizing A031165 N. J. A. Sloane
- Array generalizing A031165 franktaw at netscape.net
  - A143344 vs A080092 Richard Mathar
    - A143344 vs A080092 Joerg Arndt
d(m) = d(m+1) = 2n Leroy Quet
- d(m) = d(m+1) = 2n Leroy Quet
  - d(m) = d(m+1) = 2n Hugo van der Sanden
Puzzle Blog Frederick Schneider
Interesting question David Wilson
- Interesting question David Wilson
- Interesting question David Wilson
  - Interesting question T. D. Noe
    - Interesting question David Wilson
- Interesting question Neil Fernandez
Grid Game Question Leroy Quet
- A090331 | A093061 Leroy Quet
Heterosquares and less restrictive variations Leroy Quet
- heterosquares and less restrictive variations Jon Awbrey
- Heterosquares and...Prime Squares zak seidov
Primes in A087316 a(n) = Sum_{k=1..n} prime(k)^prime(n-k+1). Jonathan Post
Basic graph counting sequences David Wilson
- Basic graph counting sequences Eric W. Weisstein
- Basic graph counting sequences David Wilson
- Basic graph counting sequences David Wilson
  - Basic graph counting sequences Max Alekseyev
Counting equivalent expressions David Wilson
- Counting equivalent expressions David Wilson
Ambiguity in sequence A073175 First occurrence of an n-digit prime as a substring in the concatenation of the natural numbers Jonathan Post
- Ambiguity in sequence A073175 First occurrence of an n-digit prime as a substring in the concatenation of the natural numbers Jonathan Post
Composites Of This Sequence Leroy Quet
- Composites Of This Sequence Leroy Quet
  - Composites Of This Sequence Alexander Povolotsky
    - Composites Of This Sequence Maximilian Hasler
    - Composites Of This Sequence Alexander Povolotsky
  - Composites Of This Sequence David Wilson
A141059 and Quadratic Amicable koh
primes p s.t. there is an A s.t. A^(p-1)==1 mod p^2 Joerg Arndt
- primes p s.t. there is an A s.t. A^(p-1)==1 mod p^2 Max Alekseyev
  - primes p s.t. there is an A s.t. A^(p-1)==1 mod p^2 Max Alekseyev
- primes p s.t. there is an A s.t. A^(p-1)==1 mod p^2 Joerg Arndt
Two ordering problems David Wilson
- Two ordering problems Max Alekseyev
  - Two ordering problems David Wilson
    - Two ordering problems franktaw at netscape.net
    - Two ordering problems Max Alekseyev
    - Two ordering problems franktaw at netscape.net
- Two ordering problems Mitch Harris
  - Two ordering problems franktaw at netscape.net
    - Two ordering problems Max Alekseyev
    - Two ordering problems Max Alekseyev
- Two ordering problems David Wilson
  - Two ordering problems franktaw at netscape.net
web site troubles N. J. A. Sloane
A109795 a(n)= n*(1+floor(n/10)) has arbitrary "10" and can generalize Jonathan Post
Please try the new web page for sending in a new sequence! N. J. A. Sloane

Last message date: Fri Aug 29 21:11:03 CEST 2008
Archived on: Sun Jan 15 12:28:18 CET 2023

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