OFFSET
0,3
FORMULA
a(0) = 1; a(n) = -Sum_{k=1..n} ((-1)^k * (k-1)! + 1) * binomial(n,k) * a(n-k).
MATHEMATICA
m = 22; Range[0, m]! * CoefficientList[Series[1/(Exp[x] - Log[1 + x]), {x, 0, m}], x] (* Amiram Eldar, Mar 06 2022 *)
PROG
(PARI) my(N=40, x='x+O('x^N)); Vec(serlaplace(1/(exp(x)-log(1+x))))
(PARI) a(n) = if(n==0, 1, -sum(k=1, n, ((-1)^k*(k-1)!+1)*binomial(n, k)*a(n-k)));
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Mar 06 2022
STATUS
approved