OFFSET
0,4
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..425
Feng Qi and Mark Daniel Ward, Closed-form formulas and properties of coefficients in Maclaurin's series expansion of Wilf's function, arXiv:2110.08576 [math.CO], 2021.
FORMULA
a(n) ~ -sqrt(2) * n^(n-1) / (log(2)^(n - 1/2) * exp(n)). - Vaclav Kotesovec, Oct 21 2021
MATHEMATICA
m = 22; Range[0, m]! * CoefficientList[Series[Sqrt[Exp[x]*(2 - Exp[x])], {x, 0, m}], x] (* Amiram Eldar, Oct 19 2021 *)
PROG
(PARI) my(x='x+O('x^25)); Vec(serlaplace(sqrt(exp(x)*(2-exp(x)))))
CROSSREFS
KEYWORD
sign
AUTHOR
Michel Marcus, Oct 19 2021
STATUS
approved