A144345 Second column (m=2) of triangle S2p(-2) = A004747.

1, 6, 52, 600, 8680, 151200, 3082240, 71998080, 1896294400, 55601145600, 1796277683200, 63397990656000, 2427084884224000, 100175046107136000, 4434284662872064000, 209554432423784448000, 10530302071553904640000, 560682451860226375680000

Offset: 0

Author

Wolfdieter Lang, Oct 09 2008

Keywords

• nonn
• easy

Crossrefs

Cf. A004747, A008544(n-1) (m=1 column), A144346 (m=3 column).

Formula

a(n) = A004747(n+2,2), n>=0.