A082035 a(n) = (4n^2+2n+1) * n!.

1, 7, 42, 258, 1752, 13320, 113040, 1063440, 11007360, 124467840, 1527724800, 20237817600, 287879961600, 4377595622400, 70875950745600, 1217444836608000, 22115388911616000, 423623726862336000, 8534364149735424000

Offset: 0

Author

Paul Barry, Apr 02 2003

Keywords

• easy
• nonn

Comments

A row of the number array A082038.

Crossrefs

Cf. A001564, A082036.

Programs

Mathematica

Table[(4n^2+2n+1)n!,{n,0,20}] (* Harvey P. Dale, Jul 15 2011 *)

Formula

a(n) = 4*A002775(n) + A007680(n).