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 A059149 #5 May 20 2014 14:52:31
%S A059149 1,2,1,2,4,2,1,2,1,4,8,4,1,2,1,2,4,2,1,2,1,8,16,8,1,2,1,2,4,2,1,2,1,4,
%T A059149 8,4,1,2,1,2,4,2,1,2,1,16,32,16,1,2,1,2,4,2,1,2,1,4,8,4,1,2,1,2,4,2,1,
%U A059149 2,1,8,16,8,1,2,1,2,4,2,1,2,1,4,8,4,1,2,1,2,4,2,1,2,1,32,64,32,1,2,1,2
%N A059149 A hierarchical sequence (W'2{2}* - see A059126).
%H A059149 J. Wallgren, <a href="/A059126/a059126.txt">Hierarchical sequences</a>
%K A059149 easy,nonn
%O A059149 0,2
%A A059149 _Jonas Wallgren_, Feb 01 2001