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 A059150 #7 Dec 28 2023 19:18:29
%S A059150 1,2,1,4,1,2,1,2,4,2,8,2,4,2,1,2,1,4,1,2,1,4,8,4,16,4,8,4,1,2,1,4,1,2,
%T A059150 1,2,4,2,8,2,4,2,1,2,1,4,1,2,1,8,16,8,32,8,16,8,1,2,1,4,1,2,1,2,4,2,8,
%U A059150 2,4,2,1,2,1,4,1,2,1,4,8,4,16,4,8,4,1,2,1,4,1,2,1,2,4,2,8,2,4,2,1,2,1
%N A059150 A hierarchical sequence (W'2{3}* - see A059126).
%H A059150 J. Wallgren, <a href="/A059126/a059126.txt">Hierarchical sequences</a>
%Y A059150 Cf. A059126.
%K A059150 easy,nonn
%O A059150 0,2
%A A059150 _Jonas Wallgren_, Feb 01 2001