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 A286043 #9 Apr 27 2023 06:09:30
%S A286043 1,4,6,8,10,12,15,17,19,22,24,26,29,31,33,36,38,40,43,45,47,49,51,54,
%T A286043 56,58,61,63,65,68,70,72,74,76,79,81,83,86,88,90,93,95,97,99,101,104,
%U A286043 106,108,111,113,115,118,120,122,124,126,129,131,133,136,138
%N A286043 (1/2)*A285658.
%C A286043 Conjecture: a(n)/n -> (5 + sqrt(17))/2.
%H A286043 Georg Fischer, <a href="/A286043/b286043.txt">Table of n, a(n) for n = 1..10000</a> [First 8730 terms from Clark Kimberling]
%t A286043 s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {1, 0, 1, 1}}] &, {0}, 10] (* A285657 *)
%t A286043 u = Flatten[Position[s, 0]] (* A285658 *)
%t A286043 u/2 (* A286043 *)
%Y A286043 Cf. A285657, A285658, A285659.
%K A286043 nonn,easy
%O A286043 1,2
%A A286043 _Clark Kimberling_, May 01 2017