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 A050153 #4 Mar 30 2012 18:57:01
%S A050153 0,1,0,3,1,1,9,5,6,1,28,20,27,8,1,90,75,110,44,10,1,297,275,429,208,
%T A050153 65,12,1,1001,1001,1638,910,350,90,14,1,3432,3640,6188,3808,1700,544,
%U A050153 119,16,1
%N A050153 T(n,k)=M(2n+1,n-1,k-1), 0<=k<=n, n >= 0, array M as in A050144.
%e A050153 Rows: {0}; {1,0}; {3,1,1}; ...
%K A050153 nonn,tabl
%O A050153 0,4
%A A050153 _Clark Kimberling_