Triangle read by rows: S_D(n,k) = `Type D' Stirling numbers of the second kind.
1, 2, 2, 2, 9, 4, 2, 27, 36, 10, 2, 65, 195, 140, 26, 2, 143, 840, 1180, 540, 76, 2, 301
1 seqfan posts
Fri Apr 16 10:34:33 CEST 2010 [seqfan] Re: conjectured EGF and extension of A086365 and others