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A092399
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Smarandacheials for k=5.
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8
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-24, -42, 336, 216, 2500, 2376, 4032, -52416, -33264, -562500, -532224, -891072, 16039296
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| A generalization of quintuple factorials: back and forth (1972).
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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.
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LINKS
| J. Dezert, Smarandacheials
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FORMULA
| a(n) = !n!_5 = Prod_{i=0, 1, 2, ... .}_{0<|n-5i|<=n}(n-5i) = n(n-5)(n-10)....
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EXAMPLE
| !11!_5 = 11(11-5)(11-10)(11-15)(11-20) = 11(6)(1)(-4)(-9) = 2376.
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CROSSREFS
| Sequence in context: A043234 A044014 A087093 * A118299 A072096 A055480
Adjacent sequences: A092396 A092397 A092398 * A092400 A092401 A092402
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KEYWORD
| sign
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AUTHOR
| J. Dezert (Jean.Dezert(AT)onera.fr), Mar 21 2004
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