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

0,2

Links

Table of n, a(n) for n=0..17.

Formula

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

Crossrefs

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

Sequence in context: A071953 A247746 A221727 * A155661 A198281 A220933

Adjacent sequences: A144336 A144337 A144338 * A144340 A144341 A144342

Keyword

nonn,easy

Author

Wolfdieter Lang, Oct 09 2008

Status

approved