

A092399


Smarandacheials for k=5.


8



24, 42, 336, 216, 2500, 2376, 4032, 52416, 33264, 562500, 532224, 891072, 16039296
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OFFSET

0,1


COMMENTS

A generalization of quintuple factorials: back and forth (1972).


REFERENCES

J. Dezert, editor, Smarandacheials, Mathematics Magazine, Aurora, Canada, No. 4/2004 (to appear).
F. Smarandache, Back and Forth Factorials, Arizona State Univ., Special Collections, 1972.


LINKS

Table of n, a(n) for n=0..12.
J. Dezert, Smarandacheials


FORMULA

a(n) = !n!_5 = Prod_{i=0, 1, 2, ... .}_{0<n5i<=n}(n5i) = n(n5)(n10)....


EXAMPLE

!11!_5 = 11(115)(1110)(1115)(1120) = 11(6)(1)(4)(9) = 2376.


CROSSREFS

Sequence in context: A043234 A044014 A087093 * A118299 A258865 A072096
Adjacent sequences: A092396 A092397 A092398 * A092400 A092401 A092402


KEYWORD

sign


AUTHOR

J. Dezert (Jean.Dezert(AT)onera.fr), Mar 21 2004


STATUS

approved



