A074115 a(n) = n!/A000793(n).

1, 1, 1, 2, 6, 20, 120, 420, 2688, 18144, 120960, 1330560, 7983360, 103783680, 1037836800, 12454041600, 149448499200, 1693749657600, 30487493836800, 289631191449600, 5792623828992000, 121645100408832000, 2676192208994304000, 30776210403434496000

Offset

0,4

Links

Alois P. Heinz, Table of n, a(n) for n = 0..458

Crossrefs

Cf. A074859.

Sequence in context: A243252 A366760 A136795 * A013206 A073966 A013203

Adjacent sequences: A074112 A074113 A074114 * A074116 A074117 A074118

Keyword

nonn

Author

Vladeta Jovovic, Sep 16 2002

Extensions

a(0)=1 prepended by Alois P. Heinz, Jul 12 2017

Status

approved