a(n) equals the number of admissible pairs of subsets of {1,2,...,n} in the notation of Marzuola-Miller.
1, 2, 3, 8, 18, 50, 135, 385, 1065, 3053, 8701, 25579, 73693, 217718, 635220
2 seqfan posts
Mon Aug 17 16:59:40 CEST 2009 [seqfan] Re: sequences A164050 and A158449 equivalent?