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 A059136 #13 Sep 13 2022 09:35:13
%S A059136 4,10,4,16,22,16,4,10,4,28,34,28,4,10,4,16,22,16,4,10,4,40,46,40,4,10,
%T A059136 4,16,22,16,4,10,4,28,34,28,4,10,4,16,22,16,4,10,4,52,58,52,4,10,4,16,
%U A059136 22,16,4,10,4,28,34,28,4,10,4,16,22,16,4,10,4,40,46,40,4,10,4,16,22,16
%N A059136 A hierarchical sequence (W3{2,2}c - see A059126).
%H A059136 Jonas Wallgren, <a href="/A059126/a059126.txt">Hierarchical sequences</a>
%F A059136 a(n) = A059128(3*n) + A059128(3*n+1) + A059128(3*n+2). - _Sean A. Irvine_, Sep 12 2022
%Y A059136 Cf. A059126, A059128.
%K A059136 easy,nonn
%O A059136 0,1
%A A059136 _Jonas Wallgren_, Jan 19 2001