OFFSET
0,5
LINKS
Eric Weisstein's World of Mathematics, Lambert W-Function.
FORMULA
a(n) = n! * [x^n] exp(x - n*x^4/24).
E.g.f.: exp( ( 6*LambertW(x^4/6) )^(1/4) ) / (1 + LambertW(x^4/6)).
PROG
(PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(exp((6*lambertw(x^4/6))^(1/4))/(1+lambertw(x^4/6))))
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Apr 16 2023
STATUS
approved