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A093002 Product of factorials of next n numbers. 1
1, 2, 144, 2073600, 17557585920000, 192668014586363904000000, 5116462645455544976110780416000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Essentially the same as A074319. [From R. J. Mathar, Sep 08 2008]

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

a(1)=2!=2, a(2)=3!*4!=144, a(3)=4!*5!*6!, a(4)=5!*6!*7!*8!.

PROG

(PARI) a(n)=prod(i=n+1, 2*n, i!)

CROSSREFS

Sequence in context: A264153 A232998 A103207 * A074319 A188284 A306955

Adjacent sequences:  A092999 A093000 A093001 * A093003 A093004 A093005

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Mar 29 2004

EXTENSIONS

Corrected and extended by Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Mar 29 2004

STATUS

approved

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Last modified October 27 01:02 EDT 2020. Contains 338035 sequences. (Running on oeis4.)