A293905 E.g.f.: exp(Sum_{n>=1} A000041(n-1)*x^n/n).

1, 1, 2, 8, 44, 316, 2656, 26632, 299408, 3809744, 53425376, 823627456, 13758271552, 248997717568, 4826005005824, 100042516509056, 2204677070418176, 51515128563296512, 1270613780164684288, 33020423388135645184, 900956861702008749056

Offset: 0

Author

Seiichi Manyama, Oct 19 2017

Keywords

• nonn

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..433

Crossrefs

Cf. A000041, A293527.

Formula

a(0) = 1 and a(n) = (n-1)! * Sum_{k=1..n} A000041(k-1)*a(n-k)/(n-k)! for n > 0.