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%I #19 Oct 21 2017 07:47:09
%S 1,1,2,8,44,316,2656,26632,299408,3809744,53425376,823627456,
%T 13758271552,248997717568,4826005005824,100042516509056,
%U 2204677070418176,51515128563296512,1270613780164684288,33020423388135645184,900956861702008749056
%N E.g.f.: exp(Sum_{n>=1} A000041(n-1)*x^n/n).
%H Seiichi Manyama, <a href="/A293905/b293905.txt">Table of n, a(n) for n = 0..433</a>
%F a(0) = 1 and a(n) = (n-1)! * Sum_{k=1..n} A000041(k-1)*a(n-k)/(n-k)! for n > 0.
%Y Cf. A000041, A293527.
%K nonn
%O 0,3
%A _Seiichi Manyama_, Oct 19 2017
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