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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

Clark Kimberling, Table of n, a(n) for n = 2..200

FORMULA

a(n) ~ 5^(5*n+1/2) / (4*Pi^2*n^2). - Vaclav Kotesovec, Oct 19 2014

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

Cf. A001700, A248707, A248708, A248710.

Sequence in context: A190109 A272516 A246231 * A261860 A187136 A185841

Adjacent sequences:  A248706 A248707 A248708 * A248710 A248711 A248712

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Oct 12 2014

STATUS

approved

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Last modified September 19 18:25 EDT 2020. Contains 337181 sequences. (Running on oeis4.)