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 A050178 #4 Mar 30 2012 18:57:01
%S A050178 1,1,1,1,5,1,1,6,6,1,1,7,20,7,1,1,8,27,27,8,1,1,9,35,75,35,9,1,1,10,
%T A050178 44,110,110,44,10,1,1,11,54,154,275,154,54,11,1,1,12,65,208,429,429,
%U A050178 208,65,12,1,1,13,77,273,637,1001,637,273,77,13,1,1,14,90,350,910
%N A050178 T(n,k)=M0(n,k,f(n,k)), where M0 is given by A050176 and f(n,k) is the 3rd-from-least t for which M0(n,k,t) is not 0.
%C A050178 f(n,k)=1 if 2<=k<=[ (n-1)/2 ], else f(n,k)=2k-n+2.
%e A050178 Rows: {1}; {1,1}; {1,5,1}; {1,6,6,1}; ... (all palindromes)
%K A050178 nonn,tabl
%O A050178 5,5
%A A050178 _Clark Kimberling_