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 A287163 #4 May 22 2017 12:24:00
%S A287163 2,4,8,15,17,24,29,32,34,38,45,50,53,55,62,65,67,72,74,78,85,87,94,99,
%T A287163 102,104,111,114,116,121,123,127,134,139,142,144,149,151,155,162,165,
%U A287163 167,171,178,180,187,192,195,197,201,208,213,216,218,225,228,230
%N A287163 Positions of 2 in A287160.
%H A287163 Clark Kimberling, <a href="/A287163/b287163.txt">Table of n, a(n) for n = 1..10000</a>
%t A287163 s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {2, 1}, 2 -> 0}] &, {0}, 9] (* A287160 *)
%t A287163 Flatten[Position[s, 0]] (* A287161 *)
%t A287163 Flatten[Position[s, 1]] (* A287162 *)
%t A287163 Flatten[Position[s, 2]] (* A287163 *)
%Y A287163 Cf. A287160, A287161, A287162.
%K A287163 nonn,easy
%O A287163 1,1
%A A287163 _Clark Kimberling_, May 22 2017