|
|
A014609
|
|
a(n) = (5n)!/(5!^n).
|
|
9
|
|
|
1, 1, 252, 756756, 11732745024, 623360743125120, 88832646059788350720, 28837919555681211870935040, 18975581770994682860770223800320, 23183587808948692737291767860055162880, 49120458506088132224064306071170476903628800
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
COMMENTS
|
a(n) is also the constant term in product 1 <= i,j <= n, i different from j (1 - x_i/x_j)^5. - Sharon Sela (sharonsela(AT)hotmail.com), Feb 18 2002
|
|
REFERENCES
|
G. E. Andrews, R. Askey, and R. Roy, Special Functions, Cambridge University Press, 1998.
|
|
LINKS
|
|
|
PROG
|
(PARI) a(n)=if(n<0, 0, (5*n)!/120^n)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
BjornE (mdeans(AT)algonet.se)
|
|
STATUS
|
approved
|
|
|
|