OFFSET
0,4
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..27
FORMULA
a(n) = A321634(n)/n!.
a(n) ~ exp(5/12) * n^((n-1)*(2*n-1)/2) / (2*Pi)^(n/2). - Vaclav Kotesovec, Nov 24 2018
PROG
(PARI) {a(n) = sum(i=n, n^2, i!*polcoef(sum(j=1, n, (-1)^(n-j)*binomial(n-1, j-1)*x^j/j!)^n, i))/n!} \\ Seiichi Manyama, May 27 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Nov 16 2018
STATUS
approved