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 A030793 #4 Mar 30 2012 18:56:19 %S A030793 2,4,6,12,23,24,31,40,41,51,63,65,78,80,95,114,134,137,156,159,164, %T A030793 182,185,188,211,214,242,245,275,278,311,315,349,353,389,395,433,437, %U A030793 438,441,481,484,532,535,585,588,590,595,642,645 %N A030793 s(k)=1, where s=A030787. %K A030793 nonn %O A030793 1,1 %A A030793 _Clark Kimberling_