a(n) = (n+1)*(n^2+n+2)/2; g.f.: (1 + 2*x^2) / (1 - x)^4.
1, 4, 12, 28, 55, 96, 154, 232, 333, 460, 616, 804, 1027, 1288, 1590, 1936, 2329
2 seqfan posts
Mon Jan 12 11:27:00 CET 2009 [seqfan] Re: Index of linear recurrences
Sun Jan 11 23:36:02 CET 2009 [seqfan] Index of linear recurrences
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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