a(n) = 3*a(n-1) + a(n-3) with a(0)=1, a(1)=2, a(2)=6.
1, 2, 6, 19, 59, 183, 568, 1763, 5472, 16984, 52715, 163617, 507835, 1576220
2 seqfan posts
Thu Nov 24 01:36:57 CET 2011 [seqfan] Re: Missing sequence numbers
Thu Nov 24 00:53:44 CET 2011 [seqfan] Missing sequence numbers
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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