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A061924 Number of combinations in card games with 4 suits and 4 players. 2
1, 4, 56, 1320, 43680, 1860480, 96909120, 5967561600, 424097856000, 34162713446400, 3075990524006400, 306135476264217600, 33371339479827148800, 3954242643911239680000, 506046613478104258560000, 69560546966425756200960000, 10221346459144248675287040000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Harry J. Smith, Table of n, a(n) for n=0,...,100

F. Ellermann, Illustration for A001400, A061924

FORMULA

a(n) = (4*n)! / (4*n-n)!

E.g.f. in Maple notation: hypergeom([1/2, 1/4, 3/4], [1/3, 2/3], 256*x/27). - Karol A. Penson, Oct 18 2001

EXAMPLE

a(13)= 52*51*50*49*48*47*46*45*44*43*42*41*40 (Whist, Bridge)

MATHEMATICA

Table[(4n)!/(4n-n)!, {n, 0, 20}] (* Harvey P. Dale, Aug 20 2012 *)

PROG

(PARI) { for (n=0, 100, write("b061924.txt", n, " ", (4*n)! / (4*n - n)!) ) } \\ Harry J. Smith, Jul 29 2009

CROSSREFS

A001400.

Sequence in context: A009058 A276363 A218309 * A183612 A277038 A009536

Adjacent sequences:  A061921 A061922 A061923 * A061925 A061926 A061927

KEYWORD

nonn,easy

AUTHOR

Frank Ellermann, May 16 2001

EXTENSIONS

More terms from Harvey P. Dale, Aug 20 2012

STATUS

approved

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Last modified December 5 13:26 EST 2019. Contains 329751 sequences. (Running on oeis4.)