Triple factorial numbers a(n) = n!!!, defined by a(n) = n*a(n-3), a(0) = a(1) = 1, a(2) = 2.
1, 1, 2, 3, 4, 10, 18, 28, 80, 162, 280, 880, 1944, 3640, 12320, 29160, 58240, 209440
3 seqfan posts
Thu Nov 12 00:34:11 CET 2009 [seqfan] Re: Sorting out incorrect versions of sequences
Thu Nov 12 00:28:58 CET 2009 [seqfan] Re: Sorting out incorrect versions of sequences
Wed Nov 11 23:38:00 CET 2009 [seqfan] Sorting out incorrect versions of sequences
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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