a(0) = 0, a(1) = a(2) = a(3) = 1; thereafter, a(n) = a(n-1)+a(n-2)+a(n-4).
0, 1, 1, 1, 2, 4, 7, 12, 21, 37, 65, 114, 200, 351, 616, 1081, 1897, 3329, 5842, 10252
3 seqfan posts
Tue Jan 19 21:07:51 CET 2010 [seqfan] Re: Interesting sequence
Tue Jan 19 18:32:35 CET 2010 [seqfan] Interesting sequence
Thu Nov 19 17:19:12 CET 2009 [seqfan] detective work related to Creighton Dement's "Floretions"
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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