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 A048203 #4 Mar 30 2012 18:56:54 %S A048203 7,11,17,23,32,39,45,52,59,68,73,79,87,95,102,105,109,114,120,128,136, %T A048203 143,147,152,160,170,179,186,191,199,212,227,238,244,249,254,261,267, %U A048203 273,283,296,311,319,331,343,359,370,383,392 %N A048203 a(n)=T(n,3), array T given by A048201. %K A048203 nonn %O A048203 3,1 %A A048203 _Clark Kimberling_