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 A287067 #4 May 21 2017 21:29:33
%S A287067 3,4,6,10,16,17,23,26,27,29,35,38,39,43,44,46,50,56,59,60,64,65,67,73,
%T A287067 74,76,80,86,87,93,96,97,101,102,104,110,111,113,117,123,126,127,129,
%U A287067 133,139,140,146,149,150,152,158,161,162,166,167,169,175,176,178
%N A287067 Positions of 0 in A287066.
%H A287067 Clark Kimberling, <a href="/A287067/b287067.txt">Table of n, a(n) for n = 1..10000</a>
%t A287067 s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {1, 2}, 2 -> 0}] &, {1}, 10] (* A287066 *)
%t A287067 Flatten[Position[s, 0]] (* A287067 *)
%t A287067 Flatten[Position[s, 1]] (* A287068 *)
%t A287067 Flatten[Position[s, 2]] (* A287069 *)
%Y A287067 Cf. A287066, A287068, A287069.
%K A287067 nonn,easy
%O A287067 1,1
%A A287067 _Clark Kimberling_, May 21 2017