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 A030773 #4 Mar 30 2012 18:56:19 %S A030773 2,4,7,8,11,16,17,23,24,32,33,43,44,56,57,71,72,78,89,90,109,110,131, %T A030773 154,178,180,183,186,189,192,208,213,240,246,261,275,277,282,313,316, %U A030773 319,321,355,358,374,401,404,409,450,452,462 %N A030773 s(k)=1, where s=A030767. %K A030773 nonn %O A030773 1,1 %A A030773 _Clark Kimberling_