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A055981
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a(n)=ceiling(n!/d(n!)).
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0
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1, 1, 2, 3, 8, 24, 84, 420, 2268, 13440, 73920, 604800, 3931200, 33633600, 324324000, 3891888000, 33081048000, 435891456000, 4140968832000, 59281238016000, 840311548876800, 11708340914350080, 134645920515025920
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| The ceiling function is required only for n = 3 and 5.
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FORMULA
| a(n)=ceiling(A000142(n)/A027423(n))
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EXAMPLE
| For n=3 n!=6, d(n!)=4, quotient is 3/2, for n=5 n!=120, d(n!)=16, quotient=15/2. All other cases give integers.
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CROSSREFS
| A000142, A000005, A033950, A027423.
Sequence in context: A120708 A089847 A038561 * A120260 A202592 A002619
Adjacent sequences: A055978 A055979 A055980 * A055982 A055983 A055984
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Jul 21 2000
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