A115187 Row sums of triangle A115154 (called Y(3,1)).
1, 5, 39, 346, 3230, 31191, 309175, 3129194, 32211432, 336239668, 3551081432, 37876866618, 407453687104, 4415521127579, 48159808659879, 528270329593474, 5823991858003544, 64497989461609224, 717191431082458804
Offset: 0
Formula
a(n)= sum(A115154(n,m),m=1..n+1), n>=0.