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 A285344 #8 May 13 2017 00:09:22
%S A285344 1,3,4,6,8,10,11,13,14,16,18,20,21,23,25,27,28,30,32,34,35,37,38,40,
%T A285344 42,44,45,47,48,50,52,54,55,57,59,61,62,64,66,68,69,71,72,74,76,78,79,
%U A285344 81,83,85,86,88,90,92,93,95,96,98,100,102,103,105,107,109
%N A285344 (A285342)/2.
%H A285344 Clark Kimberling, <a href="/A285344/b285344.txt">Table of n, a(n) for n = 1..10000</a>
%t A285344 s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {1, 0, 1, 1}}] &, {0}, 10] (* A285341 *)
%t A285344 u = Flatten[Position[s, 0]] (* A285342 *)
%t A285344 Flatten[Position[s, 1]] (* A285343 *)
%t A285344 u/2 (* A285344)
%Y A285344 Cf. A284341, A285342, A285343.
%K A285344 nonn,easy
%O A285344 1,2
%A A285344 _Clark Kimberling_, Apr 25 2017