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 A111161 #3 Mar 30 2012 18:39:24
%S A111161 1,4,54,1268,47160,2554662,190078056,18606677896,2318813824608,
%T A111161 358492207288970,67333875395774328,15102514680368359884,
%U A111161 3987129515288957842896,1223885425250059522524238
%N A111161 a(n)=sum_{k=0...n-1}B_k*A000364(n-k)*binomial(n,k) where B_k is the k-th Bernoulli number.
%K A111161 nonn
%O A111161 0,2
%A A111161 _Benoit Cloitre_, Oct 20 2005