OFFSET
0,4
LINKS
Eric Weisstein's World of Mathematics, Lambert W-Function.
FORMULA
E.g.f.: exp( LambertW(2*x * exp(x))/2 ).
a(n) = Sum_{k=0..n} k^(n-k) * (-2*k+1)^(k-1) * binomial(n,k).
PROG
(PARI) my(N=20, x='x+O('x^N)); Vec(serlaplace(exp(lambertw(2*x*exp(x))/2)))
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Apr 29 2023
STATUS
approved