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 A059159 #12 Jan 01 2024 14:11:05
%S A059159 4,8,4,16,4,8,4,32,4,8,4,16,4,8,4,64,4,8,4,16,4,8,4,32,4,8,4,16,4,8,4,
%T A059159 128,4,8,4,16,4,8,4,32,4,8,4,16,4,8,4,64,4,8,4,16,4,8,4,32,4,8,4,16,4,
%U A059159 8,4,256,4,8,4,16,4,8,4,32,4,8,4,16,4,8,4,64,4,8,4,16,4,8,4,32,4,8,4
%N A059159 A hierarchical sequence (W'2{2}*c) - see A059126.
%H A059159 J. Wallgren, <a href="/A059126/a059126.txt">Hierarchical sequences</a>
%F A059159 a(n) = 4*A006519(n)
%o A059159 (PARI) a(n)=4<<valuation(n,2) \\ _Charles R Greathouse IV_, Jan 06 2018
%K A059159 easy,nonn
%O A059159 1,1
%A A059159 _Jonas Wallgren_, Feb 02 2001