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 A030376 #4 Mar 30 2012 18:56:18 %S A030376 2,9,12,14,16,17,18,25,36,48,53,56,59,60,62,72,76,79,82,84,85,88,91, %T A030376 94,96,97,100,101,103,104,106,107,108,109,110,112,115,118,120,121,132, %U A030376 144,149,152,155,156,158,168,183,199,206,210,214 %N A030376 Position of n-th 2 in A030373. %K A030376 nonn %O A030376 1,1 %A A030376 _Clark Kimberling_