A144352 Third column (m=3) of triangle A144351.

1, 1, 3, 9, 36, 166, 968, 6372, 49368, 429240, 4198176, 45268416, 535590144, 6879038400, 95412176640, 1419918128640, 22571960048640, 381596438638080, 6836248502784000, 129352329079142400, 2577689266340966400, 53957785094515814400, 1183674698660605132800

Offset: 0

Author

Wolfdieter Lang, Oct 09 2008

Keywords

• nonn
• easy

Crossrefs

Cf. A144351, A000142 (column m=1). Column m=2 looks like A024419.

Formula

a(n) = A144351(n+3,3), n>=0.