**Euler totient function phi(n): count numbers <= n and prime to n.**

*1, 1, 2, 2, 4, 2, 6, 4, 6, 4, 10, 4, 12, 6, 8, 8, 16, 6, 18, 8, 12, 10, 22, 8, 20, 12, 18, 12*

Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword

*36 seqfan posts*

*Mon Apr 23 08:49:52 CEST 2012* [seqfan] Re: Possible number of units in a ring

*Tue Apr 17 18:16:28 CEST 2012* [seqfan] Possible number of units in a ring

*Fri Feb 10 15:33:27 CET 2012* [seqfan] Re: A123712 and A178212

*Sun Feb 5 18:32:11 CET 2012* [seqfan] Re: 2X2 -n..n with inverse in -n..n and totient function?

*Sat Feb 4 15:43:59 CET 2012* [seqfan] 2X2 -n..n with inverse in -n..n and totient function?

*Tue Dec 6 04:12:00 CET 2011* [seqfan] Re: Use of Easy keyword

*Tue Dec 6 04:03:29 CET 2011* [seqfan] Re: Use of Easy keyword

*Tue Dec 6 01:53:28 CET 2011* [seqfan] Re: Use of Easy keyword

*Mon Jun 13 21:22:55 CEST 2011* [seqfan] GCD equals 1 pattern almost satisfies this recurrence.

*Sat May 28 09:17:01 CEST 2011* [seqfan] Proposal for better presentation of some sequences with complex numbers

*Sat May 28 07:28:39 CEST 2011* [seqfan] Re: Proposal for better presentation of some sequences with complex numbers

*Fri May 27 23:25:10 CEST 2011* [seqfan] Re: Proposal for better presentation of some sequences with complex numbers

*Fri May 27 22:42:50 CEST 2011* [seqfan] Re: Proposal for better presentation of some sequences with complex numbers

*Fri Oct 29 05:35:16 CEST 2010* [seqfan] Implementing first 500 sequences in Java

*Tue Sep 7 11:00:42 CEST 2010* [seqfan] Re: A007987 ? was Re: Re: Number of solutions of a*b + c*d + ... + y*z = 0 (mod n)

*Tue Aug 24 04:01:29 CEST 2010* [seqfan] Re: 3-sequences relations using Robert Gerbicz's seeker.c

*Tue Aug 24 01:23:51 CEST 2010* [seqfan] Re: 3-sequences relations using Robert Gerbicz's seeker.c

*Mon Aug 23 14:30:52 CEST 2010* [seqfan] 3-sequences relations using Robert Gerbicz's seeker.c

*Sun Jul 18 03:06:20 CEST 2010* [seqfan] Re: Excess permutation left moves over right moves

*Sun Jul 18 02:21:09 CEST 2010* [seqfan] Re: Excess permutation left moves over right moves

*Sun Jul 18 01:30:37 CEST 2010* [seqfan] Re: Excess permutation left moves over right moves

*Sat Jul 17 23:53:08 CEST 2010* [seqfan] Excess permutation left moves over right moves

*Sat Jun 19 23:33:47 CEST 2010* [seqfan] Re: Extending count of cyclotomic cosets to other moduli

*Sat Jun 19 21:25:20 CEST 2010* [seqfan] Extending count of cyclotomic cosets to other moduli

*Mon Mar 15 11:23:33 CET 2010* [seqfan] request: confirmation of processed edit

*Thu Feb 25 21:50:31 CET 2010* [seqfan] Re: Permutations avoiding a pair sum

*Thu Feb 25 20:27:50 CET 2010* [seqfan] Re: Permutations avoiding a pair sum

*Thu Feb 25 20:24:27 CET 2010* [seqfan] Re: Permutations avoiding a pair sum

*Thu Feb 25 15:06:50 CET 2010* [seqfan] Permutations avoiding a pair sum

*Mon Feb 22 22:02:17 CET 2010* [seqfan] Re: A173279 and A173280

*Thu Dec 17 01:51:39 CET 2009* [seqfan] Re: Divisibility sequences in OEIS.

*Sat Feb 14 02:39:45 CET 2009* [seqfan] Re: Constants derived from Artin's constants

*Fri Feb 13 18:38:17 CET 2009* [seqfan] Constants derived from Artin's constants

*Sun Feb 8 21:50:46 CET 2009* [seqfan] Re: any value storing constants of power ratios?

*Wed Nov 26 04:38:24 CET 2008* [seqfan] Re: Intermediate result for ordering problem: 2-D \phi()

*Sat Nov 22 15:50:04 CET 2008* [seqfan] Intermediate result for ordering problem: 2-D \phi()

Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword

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