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 A059154 #9 Feb 28 2019 20:45:19
%S A059154 12,96,12,768,12,96,12,6144,12,96,12,768,12,96,12,49152,12,96,12,768,
%T A059154 12,96,12,6144,12,96,12,768,12,96,12,393216,12,96,12,768,12,96,12,
%U A059154 6144,12,96,12,768,12,96,12,49152,12,96,12,768,12,96,12,6144,12,96,12,768
%N A059154 A hierarchical sequence (W'2{3}c - see A059126).
%H A059154 J. Wallgren, <a href="/A059126/a059126.txt">Hierarchical sequences</a>
%F A059154 a(n) = 12*8^A007814(n). - _Mitch Harris_, Jun 29 2005
%Y A059154 Cf. A007814, A059126.
%K A059154 easy,nonn
%O A059154 0,1
%A A059154 _Jonas Wallgren_, Feb 02 2001