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A265952 E.g.f.: Product_{k>=1} (1 + exp(x)*x^k). 5

%I

%S 1,1,4,21,136,1045,9396,99379,1161952,14904873,208925380,3207759511,

%T 53349017184,950481426349,17959336305652,360094085423115,

%U 7656053670162496,172173524035504849,4077253037751090948,101263725993658291615,2627592803013505930240

%N E.g.f.: Product_{k>=1} (1 + exp(x)*x^k).

%H Vaclav Kotesovec, <a href="/A265952/b265952.txt">Table of n, a(n) for n = 0..440</a>

%t nmax=20; CoefficientList[Series[Product[(1+E^x*x^k), {k, 1, nmax}], {x, 0, nmax}], x] * Range[0, nmax]!

%Y Cf. A265953.

%K nonn

%O 0,3

%A _Vaclav Kotesovec_, Dec 19 2015

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Last modified October 22 16:15 EDT 2021. Contains 348174 sequences. (Running on oeis4.)