Central polygonal numbers: n^2 - n + 1.
1, 1, 3, 7, 13, 21, 31, 43, 57, 73, 91, 111, 133, 157, 183, 211, 241, 273, 307, 343, 381
7 seqfan posts
Sun Jul 18 18:24:45 CEST 2010 [seqfan] Re: A002061
Sun Jul 18 07:56:34 CEST 2010 [seqfan] A002061
Fri Apr 16 08:01:45 CEST 2010 [seqfan] Re: A160242
Thu Apr 15 12:24:41 CEST 2010 [seqfan] Re: A160242
Sun Jun 28 21:34:47 CEST 2009 [seqfan] Re: A161984: obscure definition
Sun Jun 28 14:12:18 CEST 2009 [seqfan] Re: A161984: obscure definition
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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