A144282 Second column (m=2) of triangle S2hat(-3) = A144280.

1, 3, 30, 294, 4599, 81081, 1837836, 47609100, 1449052605, 49597258095, 1908702935370, 81045039516210, 3775424041048275, 191061229964098725, 10445176764205306200, 613084928455370309400, 38459158233446064893625, 2567221442902306374982875

Offset: 0

Author

Wolfdieter Lang, Oct 09 2008

Keywords

• nonn
• easy

Crossrefs

Cf. A144280, A008545 (m=1 column), A144283 (m-3 column).

Formula

a(n) = A144280(n+2,2), n>=0.