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 A287332 #4 May 23 2017 21:00:42
%S A287332 2,4,5,6,10,12,14,15,16,20,21,22,26,27,28,32,36,40,42,44,45,46,50,52,
%T A287332 54,55,56,60,62,64,65,66,70,71,72,76,77,78,82,86,90,92,94,95,96,100,
%U A287332 101,102,106,107,108,112,116,120,122,124,125,126,130,131,132
%N A287332 Positions of 0 in A287331.
%H A287332 Clark Kimberling, <a href="/A287332/b287332.txt">Table of n, a(n) for n = 1..10000</a>
%t A287332 s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {2, 2}, 2 -> 0}] &, {0}, 10] (* A287331 *)
%t A287332 Flatten[Position[s, 0]] (* A287332 *)
%t A287332 Flatten[Position[s, 1]] (* A287333 *)
%t A287332 Flatten[Position[s, 2]] (* A287334 *)
%Y A287332 Cf. A287331, A287333, A287334.
%K A287332 nonn,easy
%O A287332 1,1
%A A287332 _Clark Kimberling_, May 23 2017