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 A174886 #3 Sep 08 2013 13:31:53 %S A174886 0,0,1,1,1,0,1,0,2,1,1,2,2,1,1,2,2,2,0,2,2,2,0,2,2,2,0,2,2,2,0,2,3,2, %T A174886 2,2,2,3,2,2,3,2,2,2,2,3,2,2,3,2,2,2,2,3,2,2,3,2,2,2,2,3,2,2,4,3,2,1, %U A174886 2,3,4,1,4,3,2,1,2,3,4,1,4,3,2,1,2,3,4,1,4,3,2,1,2,3,4,1,4 %N A174886 2^a(n)=A105154(n). %K A174886 nonn %O A174886 0,9 %A A174886 _Philippe Deléham_, Apr 01 2010