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A074115
a(n) = n!/A000793(n).
4
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
CROSSREFS
Cf. A074859.
Sequence in context: A243252 A366760 A136795 * A013206 A073966 A013203
KEYWORD
nonn
AUTHOR
Vladeta Jovovic, Sep 16 2002
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Jul 12 2017
STATUS
approved