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 A030488 #4 Mar 30 2012 18:56:18 %S A030488 1,2,5,6,9,13,17,19,23,24,28,32,36,40,44,49,53,58,63,66,71,73,77,82, %T A030488 87,90,95,97,101,106,111,114,119,120,125,130,135,140,145,150,155,160, %U A030488 165,170,175,180,185,190,195,200,205,210,215,220 %N A030488 Position of n-th 1 in A030298. %K A030488 nonn %O A030488 1,2 %A A030488 _Clark Kimberling_