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 A031114 #4 Mar 30 2012 18:56:21 %S A031114 2,8,20,33,47,54,55,57,62,71,74,76,83,87,107,126,139,142,157,170,177, %T A031114 192,193,196,201,209,216,224,227,232,233,242,265,266,281,284,293,294, %U A031114 295,297,303,312,322,337,352,359,362,363,371 %N A031114 Position of n-th 2 in A031111. %K A031114 nonn %O A031114 1,1 %A A031114 _Clark Kimberling_