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 A157686 #10 Jun 24 2022 20:00:45 %S A157686 1,1,0,0,1,0,1,1,0,1,1,0,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,0,1,0,0,1,0,1, %T A157686 1,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,0,1,1,0,1,1,0,0,1,0,1,1,0,1,1,0,0,1, %U A157686 0,0,1,0,1,1,0,1,0,0,1,1,0,1,1,0,0,1,0,1,1,0,1,1,0,0,1,0,0,1,1,0,1,0,0,1,0 %N A157686 a(n) = A157684(n) - A157685(n). %C A157686 For n>=1 a(n) = A000002(n+1)-1 and also a(n) = A123594(n+3). %H A157686 Rabie A. Mahmoud, <a href="http://www.researchgate.net/profile/Rabie_Mahmoud2/publication/271910838">Hardware Implementation of Binary Kolakoski Sequence</a>, Research Gate, 2015. %Y A157686 Cf. A000002, A123594, A157684, A157685, A157687. %Y A157686 Partial sums of A054354. %K A157686 nonn %O A157686 1,1 %A A157686 _Benoit Cloitre_, Mar 04 2009