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 A030569 #4 Mar 30 2012 18:56:18 %S A030569 1,7,8,9,11,13,15,17,20,32,44,56,68,69,71,74,77,80,83,85,86,87,88,89, %T A030569 91,92,94,95,97,98,100,101,104,105,107,110,113,116,119,122,123,125, %U A030569 128,131,134,137,140,141,143,146,149,152,155,158 %N A030569 Position of n-th 1 in A030567. %K A030569 nonn %O A030569 1,2 %A A030569 _Clark Kimberling_