OFFSET
0,6
FORMULA
a(n) = n! * Sum_{k=0..floor(n/4)} (n-4*k)! * Stirling1(k,n-4*k)/(24^k*k!).
PROG
(PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(1/(1-x*log(1+x^4/24))))
(PARI) a(n) = n!*sum(k=0, n\4, (n-4*k)!*stirling(k, n-4*k, 1)/(24^k*k!));
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Aug 19 2024
STATUS
approved