a(n) = (1/2)*(3^n - 2^(n+1) + 3).
1, 1, 2, 7, 26, 91, 302, 967, 3026, 9331, 28502, 86527, 261626, 788971, 2375102
4 seqfan posts
Mon Jul 6 21:40:43 CEST 2009 [seqfan] R: Seqfan Digest, Vol 10, Issue 5
Mon Jul 6 16:53:51 CEST 2009 [seqfan] Re: A134063 and A162399 are the same
Mon Jul 6 16:27:51 CEST 2009 [seqfan] Re: A134063 and A162399 are the same
Mon Jul 6 15:09:53 CEST 2009 [seqfan] A134063 and A162399 are the same
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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