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

%I #9 Oct 27 2017 10:14:18

%S 1,-1,1,-7,73,-421,2641,-32131,403537,-4527433,57723841,-902025631,

%T 15198774361,-258241785517,4617616213393,-92675891536411,

%U 2008139896617121,-44077045165245841,1009237851013130497,-25134834585692446903,658430145120963410281

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

%H Seiichi Manyama, <a href="/A294291/b294291.txt">Table of n, a(n) for n = 0..440</a>

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

%Y Column k=3 of A294289.

%K sign

%O 0,4

%A _Seiichi Manyama_, Oct 27 2017