|
Search: id:A061924
|
|
|
| A061924 |
|
Number of combinations in card games with 4 suits and 4 players. |
|
+0
2
|
|
| 1, 4, 56, 1320, 43680, 1860480, 96909120, 5967561600, 424097856000, 34162713446400, 3075990524006400, 306135476264217600, 33371339479827148800, 3954242643911239680000
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
LINKS
|
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 (penson(AT)lptl.jussieu.fr), Oct 18 2001
|
|
EXAMPLE
|
a(13)= 52*51*50*49*48*47*46*45*44*43*42*41*40 (Whist, Bridge)
|
|
CROSSREFS
|
A001400.
Sequence in context: A111874 A078533 A009058 this_sequence A009536 A009558 A113583
Adjacent sequences: A061921 A061922 A061923 this_sequence A061925 A061926 A061927
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
(Frank.Ellermann(AT)t-online.de), May 16 2001
|
|
|
Search completed in 0.002 seconds
|
