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 A030343 #4 Mar 30 2012 18:56:18 %S A030343 1,4,5,6,8,11,17,18,20,23,25,26,27,28,29,31,32,35,36,38,41,45,52,54, %T A030343 55,58,63,72,73,76,80,82,84,85,86,88,90,92,96,97,100,104,107,108,109, %U A030343 111,112,115,116,118,119,120,121,122,123,124,126 %N A030343 Position of n-th 1 in A030341. %K A030343 nonn %O A030343 1,2 %A A030343 _Clark Kimberling_