A294291 E.g.f.: exp(1/((1+x)*(1+x^2)*(1+x^3)) - 1).

1, -1, 1, -7, 73, -421, 2641, -32131, 403537, -4527433, 57723841, -902025631, 15198774361, -258241785517, 4617616213393, -92675891536411, 2008139896617121, -44077045165245841, 1009237851013130497, -25134834585692446903, 658430145120963410281

Offset: 0

Author

Seiichi Manyama, Oct 27 2017

Keywords

• sign

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..440

Crossrefs

Column k=3 of A294289.

Programs

PARI

N=66; x='x+O('x^N); Vec(serlaplace(exp(1/((1+x)*(1+x^2)*(1+x^3))-1)))