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 A030760 #4 Mar 30 2012 18:56:19 %S A030760 1,7,3,5,17,8,35,13,45,34,19,46,27,61,95,36,164,48,97,141,96,63,196, %T A030760 118,80,303,142,98,169,120,200,436,391,199,144,233,349,171,270,493, %U A030760 269,201,610,308,235,548,351,495,350,271,744,310 %N A030760 a(n)=least k such that s(k)=n, where s=A030757. %K A030760 nonn %O A030760 1,2 %A A030760 _Clark Kimberling_