VOOZH about

URL: https://oeis.org/A055637

⇱ A055637 - OEIS

login
A055637
(n-1)!/n or 0 if n does not divide (n-1)!.
0
1, 0, 0, 0, 0, 20, 0, 630, 4480, 36288, 0, 3326400, 0, 444787200, 5811886080, 81729648000, 0, 19760412672000, 0, 6082255020441600, 115852476579840000, 2322315553259520000, 0, 1077167364120207360000, 24817936069329577574400
OFFSET
1,6
REFERENCES
Dave Wells, The Penguin Dictionary of Curious and Interesting Numbers (Revised Edition), Penguin Books, ISBN 0-14-02.6149-4, 1998, page 39.
MATHEMATICA
Do[If[Mod[(n-1)!, n]==0, Print[(n-1)!/n], Print[0]], {n, 1, 30}]
(* Alternative: *)
Table[If[Divisible[(n-1)!, n], (n-1)!/n, 0], {n, 30}] (* Harvey P. Dale, May 04 2018 *)
CROSSREFS
Sequence in context: A084029 A343329 A008426 * A086684 A221335 A298672
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Jun 07 2000
STATUS
approved