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 A031037 #4 Mar 30 2012 18:56:20 %S A031037 1,8,10,11,12,14,16,18,20,22,27,43,59,75,91,107,120,123,125,126,129, %T A031037 132,135,138,141,144,145,147,148,149,150,151,153,154,156,157,159,160, %U A031037 162,163,165,166,168,171,173,174,177,180,183,186 %N A031037 Position of n-th 1 in A031035. %K A031037 nonn %O A031037 1,2 %A A031037 _Clark Kimberling_