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 A050177 #4 Mar 30 2012 18:57:01
%S A050177 1,1,1,1,3,1,1,4,4,1,1,5,9,5,1,1,6,14,14,6,1,1,7,20,28,20,7,1,1,8,27,
%T A050177 48,48,27,8,1,1,9,35,75,90,75,35,9,1,1,10,44,110,165,165,110,44,10,1,
%U A050177 1,11,54,154,275,297,275,154,54,11,1,1,12,65,208,429,572,572
%N A050177 T(n,k)=M0(n,k,f(n,k)), where M0 is given by A050176 and f(n,k) is the next-to-least t for which M0(n,k,t) is not 0.
%C A050177 f(n,k)=0 if 1<=k<=[ (n-1)/2 ], else f(n,k)=2k-n+1.
%e A050177 Rows: {1}; {1,1}; {1,3,1}; {1,4,4,1}; ... (all palindromes)
%K A050177 nonn,tabl
%O A050177 3,5
%A A050177 _Clark Kimberling_