A144889 Third column (m=3) of triangle A144886 (S1hat(4)).

1, 4, 36, 264, 2040, 16000, 149600, 1362240, 14326080, 158438400, 1931731200, 25155648000, 357727910400, 5420614348800, 88408793088000, 1532112261120000, 28238983686144000, 549825606070272000, 11292931674759168000, 243644152971018240000, 5511211980392079360000

Offset: 0

Author

Wolfdieter Lang, Oct 09 2008

Keywords

• nonn
• easy

Crossrefs

Cf. A144888 (second column).

Formula

a(n) = A144886(n+3,3), n>=0.