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 A050161 #6 Mar 30 2012 18:57:01
%S A050161 0,1,1,3,4,5,9,14,20,21,28,48,75,83,84,90,165,275,319,329,330,297,572,
%T A050161 1001,1209,1274,1286,1287,1001,2002,3640,4550,4900,4990,5004,5005,
%U A050161 3432,7072,13260,17068,18768,19312,19431,19447
%N A050161 T(n,k)=S(2n+1,n-1,k-1), 0<=k<=n, n >= 0, array S as in A050157.
%F A050161 T(n, k)=Sum{t(n, j): 0<=j<=k}, array t as in A050153.
%e A050161 Rows: {0}; {1,1}; {3,4,5}; ...
%K A050161 nonn,tabl
%O A050161 0,4
%A A050161 _Clark Kimberling_