A144339 Second column (m=2) of triangle S2hat(-4) = A144285.

1, 4, 52, 648, 12888, 286272, 8182944, 266366016, 10191545280, 437925035520, 21158411936256, 1127285473434624, 65884689657464832, 4181915450891501568, 286704379021188538368, 21099339893878107144192, 1659252422924430692327424, 138827012602215571388891136

Offset: 0

Author

Wolfdieter Lang, Oct 09 2008

Keywords

• nonn
• easy

Crossrefs

Cf. A144285, A008546 (m=1 column), A144340 (m=3 column).

Formula

a(n) = A144285(n+2,2), n>=0.