Triangle T(n,k) counts unrooted hypertrees on n labeled vertices with k hyperedges.
1, 1, 3, 1, 12, 16, 1, 35, 150, 125, 1, 90, 900, 2160, 1296, 1, 217, 4410, 22295, 36015
2 seqfan posts
Sat Jun 30 08:15:43 CEST 2012 [seqfan] Re: Likely error in A210586.