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 A059151 #5 May 20 2014 14:52:31
%S A059151 1,2,1,2,4,2,1,2,1,2,4,2,4,8,4,2,4,2,1,2,1,2,4,2,1,2,1,4,8,4,8,16,8,4,
%T A059151 8,4,1,2,1,2,4,2,1,2,1,2,4,2,4,8,4,2,4,2,1,2,1,2,4,2,1,2,1,8,16,8,16,
%U A059151 32,16,8,16,8,1,2,1,2,4,2,1,2,1,2,4,2,4,8,4,2,4,2,1,2,1,2,4,2,1,2,1,4
%N A059151 A hierarchical sequence (W'3{2,2}* - see A059126).
%H A059151 J. Wallgren, <a href="/A059126/a059126.txt">Hierarchical sequences</a>
%K A059151 easy,nonn
%O A059151 0,2
%A A059151 _Jonas Wallgren_, Feb 01 2001