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 A135752 #4 May 05 2014 03:53:47
%S A135752 1,1,3,16,129,1436,20853,379716,8421969,222507532,6879755613,
%T A135752 245389976756,9977456650329,457823345757948,23505009169553733,
%U A135752 1340233911805244836,84321693844646338209,5820386696023034821484
%N A135752 E.g.f.: A(x) = 1 + Sum_{n>=1} (1/n!)*Product_{k=1..n} [exp(kx) - 1].
%H A135752 Vaclav Kotesovec, <a href="/A135752/b135752.txt">Table of n, a(n) for n = 0..180</a>
%o A135752 (PARI) {a(n)=n!*polcoeff(1+sum(j=1,n,(1/j!)*prod(k=1,j,exp(k*x +x*O(x^n))-1)),n)}
%K A135752 nonn
%O A135752 0,3
%A A135752 _Paul D. Hanna_, Nov 27 2007