A144884 Third column (m=3) of triangle A144881 (S1hat(3)).

1, 3, 21, 123, 792, 5292, 42768, 348840, 3313440, 33734880, 382423680, 4683303360, 62795865600, 903908678400, 14018003596800, 231803919244800, 4081121327001600, 76062618390528000, 1497060883196928000, 31001124301830144000, 673857550403702784000

Offset

0,2

Links

Table of n, a(n) for n=0..20.

Formula

a(n) = A144881(n+3,3), n>=0.

Crossrefs

Cf. A144881, A144883 (second column).

Sequence in context: A247247 A322185 A171137 * A004658 A034552 A356889

Adjacent sequences: A144881 A144882 A144883 * A144885 A144886 A144887

Keyword

nonn,easy

Author

Wolfdieter Lang, Oct 09 2008

Status

approved