OFFSET
9,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 9..650
FORMULA
a(n) ~ 32^n / (246960*sqrt(Pi)*n^(3/2)). - Vaclav Kotesovec, Jun 01 2015
MAPLE
A:= proc(n, k) option remember; `if`(n=0, 1, k/n*
add(binomial(2*n, j)*(n-j)*(k-1)^j, j=0..n-1))
end:
T:= (n, k)-> add((-1)^i*A(n, k-i)/(i!*(k-i)!), i=0..k):
a:= n-> T(n, 9):
seq(a(n), n=9..25);
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 31 2015
STATUS
approved