OFFSET
0,4
FORMULA
a(0) = 1; a(n) = Sum_{k=0..floor((n-3)/4)} (4*k+2)! * binomial(n,4*k+3) * a(n-4*k-3).
PROG
(PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(1/(1-sum(k=0, N\4, x^(4*k+3)/(4*k+3)))))
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Sep 24 2023
STATUS
approved