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 A051196 #4 Mar 30 2012 18:57:01 %S A051196 0,5,21,81,330,1287,4995,19448,75582,293895,1144066,4457400,17383734, %T A051196 67863915,265182525,1037157858,4059928950,15905368710,62359142274, %U A051196 244662670200,960566918220,3773655743715,14833897694226,58343356817424 %N A051196 T(2n+3,n), array T as in A050186; a count of aperiodic binary words. %K A051196 nonn %O A051196 0,2 %A A051196 _Clark Kimberling_