OFFSET
0,4
LINKS
Eric Weisstein's World of Mathematics, Lambert W-Function.
FORMULA
E.g.f.: exp( LambertW(2*x * (1+x))/2 ).
a(n) = n! * Sum_{k=0..n} (-2*k+1)^(k-1) * binomial(k,n-k)/k!.
PROG
(PARI) my(N=20, x='x+O('x^N)); Vec(serlaplace(exp(lambertw(2*x*(1+x))/2)))
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Seiichi Manyama, Aug 18 2023
STATUS
approved