OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..100
FORMULA
a(n) = [x^n] (n!)^6 * (Sum_{j=0..n} x^j/(j!)^6)^n.
MAPLE
b:= proc(n, i) option remember; `if`(n=0, 1, `if`(i<1, 0,
add(b(n-j, i-1)*binomial(n, j)^5/j!, j=0..n)))
end:
a:= n-> n!*b(n$2):
seq(a(n), n=0..15);
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Aug 19 2014
STATUS
approved