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 A030733 #4 Mar 30 2012 18:56:19 %S A030733 2,3,6,14,15,19,22,30,31,41,42,53,55,68,70,85,87,103,106,126,148,167, %T A030733 172,193,194,199,213,229,254,257,258,262,264,295,300,302,335,341,343, %U A030733 380,385,387,431,433,480,482,526,532,534,576 %N A030733 s(k)=1, where s=A030727. %K A030733 nonn %O A030733 1,1 %A A030733 _Clark Kimberling_