The number of integer sequences of length d = 2n+1 such that the sum of the terms is 0 and the sum of the absolute values of the terms is d-1.
1, 6, 110, 2562, 66222, 1815506, 51697802, 1511679210, 45076309166
1 seqfan posts
Tue Feb 10 06:18:52 CET 2009 [seqfan] Re: 1,6,110,2562,66222,...