OFFSET
0,4
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..417
Eric Weisstein's World of Mathematics, Lambert W-Function.
FORMULA
a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/2)} A034940(k) * binomial(n-1,2*k) * a(n-2*k-1).
PROG
(PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(exp(sqrt(-lambertw(-x^2)))))
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Apr 14 2023
STATUS
approved