|
|
A248709
|
|
f(5n)/(f(n-2)*f(n-1)*f(n)*f(n+1)*f(n+2)), where f(k) = k!.
|
|
4
|
|
|
12600, 37837800, 97772875200, 247365374256000, 629483036137956000, 1621828071329658192000, 4234824783966213204768000, 11198994141198650820008976000, 29959571750765218953790679280000, 80980722442318386832096206093840000
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
2,1
|
|
COMMENTS
|
These are multinomial coefficients.
|
|
LINKS
|
|
|
FORMULA
|
|
|
EXAMPLE
|
a(3) = 15!/(1!*2!*3!*4!*5!) = 37837800.
|
|
MATHEMATICA
|
Table[(5 n)!/((n - 2)! (n - 1)! n! (n + 1)! (n + 2)!), {n, 2, 20}]
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|