A144273 Third column (m=3) of triangle S2hat(-1) = A144270.

1, 1, 4, 19, 132, 1119, 12057, 151560, 2234970, 37355130, 702161460, 14608747440, 333760916475, 8297318063475, 223043540630400, 6444290305953675, 199158606533605950, 6554872218153191625, 228899544451085017125, 8452452568601816775000, 329069272855540304587500

Offset: 0

Author

Wolfdieter Lang, Oct 09 2008

Keywords

• nonn
• easy

Crossrefs

Cf. A144270, A144272 (column m=2).

Formula

a(n) = A144270(n+3,3), n>=0.