OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..422
FORMULA
a(n) = A129062(n+2,2), n>=0.
a(n) = A079641(n+1,1), n>=0.
E.g.f.: (d^2/dx^2)((-log(2-exp(x)))^2)/2.
E.g.f.: d/dx (f(x) * Integral f(x) dx), where f(x) = exp(x)/(2-exp(x)), cf. A000629. - Seiichi Manyama, Oct 22 2019
a(n) ~ n! * n * log(n) / (log(2))^(n+2) * (1 + (gamma - log(2) - log(log(2))) / log(n)), where gamma is the Euler-Mascheroni constant A001620. - Vaclav Kotesovec, Oct 22 2019
PROG
(PARI) N=20; x='x+O('x^N); f=exp(x)/(2-exp(x)); Vec(serlaplace(deriv(f*intformal(f)))) \\ Seiichi Manyama, Oct 22 2019
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, May 04 2007
STATUS
approved