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 A059148 #5 May 20 2014 14:52:31
%S A059148 1,2,1,4,8,4,1,2,1,16,32,16,64,128,64,16,32,16,1,2,1,4,8,4,1,2,1,256,
%T A059148 512,256,1024,2048,1024,256,512,256,1,2,1,4,8,4,1,2,1,16,32,16,64,128,
%U A059148 64,16,32,16,1,2,1,4,8,4,1,2,1,4096,8192,4096,16384,32768,16384,4096
%N A059148 A hierarchical sequence (W'3{2,2} - see A059126).
%H A059148 J. Wallgren, <a href="/A059126/a059126.txt">Hierarchical sequences</a>
%K A059148 easy,nonn
%O A059148 0,2
%A A059148 _Jonas Wallgren_, Feb 01 2001