**Pentagonal numbers: n*(3*n-1)/2.**

*0, 1, 5, 12, 22, 35, 51, 70, 92, 117, 145, 176, 210, 247, 287, 330, 376, 425, 477, 532*

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

*24 seqfan posts*

*Tue Dec 13 17:47:02 CET 2011* [seqfan] Re: A090864 == A118300

*Tue Dec 13 17:32:45 CET 2011* [seqfan] A090864 == A118300

*Tue Aug 30 19:51:02 CEST 2011* [seqfan] Lack of takers: DoItYourself: the difference between A078521and A137432

*Tue Jan 25 10:23:09 CET 2011* [seqfan] Re: OEISWiki : decomposition into weight * level + jump

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

*Sun Sep 26 06:48:14 CEST 2010* [seqfan] Re: n-th number whose sum of divisors is a n-gonal number

*Sun Sep 26 05:22:18 CEST 2010* [seqfan] Re: n-th number whose sum of divisors is a n-gonal number

*Wed Jul 28 20:25:39 CEST 2010* [seqfan] Re: Numbers n such that the decimal representation of n is contained as substring in that of the n-th pentagonal number.

*Tue Jul 27 12:19:12 CEST 2010* [seqfan] Re: Numbers n such that the decimal representation of n is contained as substring in that of the n-th pentagonal number.

*Tue Jul 27 03:22:34 CEST 2010* [seqfan] Re: Numbers n such that the decimal representation of n is contained as substring in that of the n-th pentagonal number.

*Tue Jul 27 03:12:01 CEST 2010* [seqfan] Re: Numbers n such that the decimal representation of n is contained as substring in that of the n-th pentagonal number.

*Tue Jul 27 02:45:24 CEST 2010* [seqfan] Numbers n such that the decimal representation of n is contained as substring in that of the n-th pentagonal number.

*Sat May 1 17:30:24 CEST 2010* [seqfan] Re: A possible list of new sequences

*Sat May 1 15:12:55 CEST 2010* [seqfan] Re: A possible list of new sequences

*Sat May 1 13:12:04 CEST 2010* [seqfan] A possible list of new sequences

*Mon Apr 26 10:05:38 CEST 2010* [seqfan] Re: A (new) problem

*Mon Apr 26 09:10:27 CEST 2010* [seqfan] Re: A (new) problem

*Mon Apr 26 01:02:41 CEST 2010* [seqfan] Re: A (new) problem

*Sun Apr 25 18:40:15 CEST 2010* [seqfan] Re: A (new) problem

*Sun Apr 25 15:59:21 CEST 2010* [seqfan] A (new) problem

*Sat Mar 13 00:55:32 CET 2010* [seqfan] Re: Sophie Germain pentagonal numbers

*Sat Mar 13 00:37:31 CET 2010* [seqfan] Re: Sophie Germain pentagonal numbers

*Sat Mar 13 00:11:32 CET 2010* [seqfan] Sophie Germain pentagonal numbers

*Mon Jan 12 11:27:00 CET 2009* [seqfan] Re: Index of linear recurrences

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

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