This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A141006 #13 Oct 17 2017 14:35:57
%S A141006 1,3,22,235,3139,49376,891491,18160071,411124024,10212362573,
%T A141006 275543711899,8012352809874,249516568317597,8277748828228015,
%U A141006 291219448755079278,10821916875914147551,423314732431005599479
%N A141006 E.g.f. exp(sum_{d|M} (exp(d*x)-1)/d), M=9.
%H A141006 Vincenzo Librandi, <a href="/A141006/b141006.txt">Table of n, a(n) for n = 0..200</a>
%t A141006 u[0, j_]: = 1; u[k_, j_]: = u[k, j] = Sum[Binomial[k-1, i-1]Plus@@(u[k-i, j]#^(i-1)&/@Divisors[j]), {i, k}]; Table[u[n, 9], {n, 0, 30}](* _Vincenzo Librandi_, Dec 12 2012 *)
%Y A141006 Column k=9 of A162663.
%K A141006 nonn
%O A141006 0,2
%A A141006 _R. J. Mathar_, Jul 11 2008