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 A107112 #3 Mar 30 2012 18:59:07
%S A107112 1,2,5,15,54,228,1106,6069,37212,252287,1873928,15127191,131788320,
%T A107112 1231650843,12283477562,130137706957,1458823402224,17242265101407,
%U A107112 214202486482516,2789239633559763,37974772474452740,539356744121554370
%N A107112 Row sums of A107111, viewed as a number triangle.
%F A107112 a(n)=sum{k=0..n, sum{j=0..k, binomial((n-k)(k+1), k-j)*binomial(k+j, j)}/(k+1)}
%K A107112 easy,nonn
%O A107112 0,2
%A A107112 _Paul Barry_, May 12 2005