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A131978 A049614(n)/A131685(n). 0
1, 1, 1, 4, 4, 24, 24, 192, 1728, 17280, 17280, 207360, 207360, 414720, 6220800, 99532800, 696729600, 12541132800, 12541132800, 250822656000, 5267275776000, 10534551552000, 10534551552000, 252829237248000, 1264146186240000, 12641461862400000, 3754514173132800000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Conjectured to be always integral.

It appears that every term > 4 is divisible by 3 - Alexander R. Povolotsky, Oct 18 2007

LINKS

Table of n, a(n) for n=1..27.

CROSSREFS

Sequence in context: A271132 A270456 A088304 * A049614 A269186 A058166

Adjacent sequences:  A131975 A131976 A131977 * A131979 A131980 A131981

KEYWORD

nonn

AUTHOR

Alexander R. Povolotsky, Sep 21 2007

STATUS

approved

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Last modified April 5 06:13 EDT 2020. Contains 333238 sequences. (Running on oeis4.)