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 A050156 #4 Mar 30 2012 18:57:01
%S A050156 1,4,1,14,6,1,48,27,8,1,165,110,44,10,1,572,429,208,65,12,1,2002,1638,
%T A050156 910,350,90,14,1,7072,6188,3808,1700,544,119,16,1,25194,23256,15504,
%U A050156 7752,2907,798,152,18,1
%N A050156 T(n,k)=M(2n+3,n+3,k+3), 0<=k<=n, n >= 0, array M as in A050144.
%e A050156 Rows: {1}; {4,1}; {14,6,1}; ...
%K A050156 nonn,tabl
%O A050156 0,2
%A A050156 _Clark Kimberling_