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 A059147 #5 May 20 2014 14:52:31
%S A059147 1,2,1,4,1,2,1,8,16,8,32,8,16,8,1,2,1,4,1,2,1,64,128,64,256,64,128,64,
%T A059147 1,2,1,4,1,2,1,8,16,8,32,8,16,8,1,2,1,4,1,2,1,512,1024,512,2048,512,
%U A059147 1024,512,1,2,1,4,1,2,1,8,16,8,32,8,16,8,1,2,1,4,1,2,1,64,128,64,256
%N A059147 A hierarchical sequence (W'2{3} - see A059126).
%H A059147 J. Wallgren, <a href="/A059126/a059126.txt">Hierarchical sequences</a>
%K A059147 easy,nonn
%O A059147 0,2
%A A059147 _Jonas Wallgren_, Feb 01 2001