OFFSET
0,4
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..449
FORMULA
Convolution inverse of A293236.
a(n) ~ -(-1)^n * n! * (1 - 2/n - 7/n^3 - 39/n^4 - 272/n^5 - 2457/n^6 - 26443/n^7 - 324675/n^8 - 4453439/n^9 - 67360840/n^10), for coefficients see A293265. - Vaclav Kotesovec, Oct 04 2017
MATHEMATICA
nmax = 30; CoefficientList[Series[Product[1/Sum[(-1)^j*j!*x^(j*k), {j, 0, nmax}], {k, 1, nmax}], {x, 0, nmax}], x] (* Vaclav Kotesovec, Oct 04 2017 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Oct 04 2017
STATUS
approved