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 A100428 #16 Oct 08 2014 04:30:30 %S A100428 1,2,1,1,2,2,1,2,1,2,2,1,1,2,1,1,2,2,1,2,1,1,2,2,1,1,2,1,2,1,1,2,2,1, %T A100428 2,1,1,2,2,1,2,2,1,2,2,1,2,1,1,2,1,1,2,2,1,2,1,1,2,2,1,2,1,2,2,1,1,2, %U A100428 1,2,1,1,2,2,1,2,2,1,1,2,1,2,2,1,2,2,1,1,2,1,2,2,1,1,2,1,1,2,2,1,1,2,1,2,1 %N A100428 Bisection of Kolakoski sequence A000002. %C A100428 Lengths of runs of ones in A000002. - _Reinhard Zumkeller_, Aug 03 2013 %C A100428 As in the Kolakoski sequence itself, the length of runs in this sequence is 1 or 2 : a run X,X,X is not possible, since it would imply X,Y,X,Y,X in the Kolakoski sequence, which in turn would imply 1, 1, 1 somewhere before (one Y, one X, one Y) which is not possible. - _Jean-Christophe Hervé_, Oct 04 2014 %H A100428 Reinhard Zumkeller, <a href="/A100428/b100428.txt">Table of n, a(n) for n = 1..10000</a> %o A100428 (Haskell) %o A100428 a100428 n = a100428_list !! n %o A100428 a100428_list = f a000002_list where f (u:_:us) = u : f us %o A100428 -- _Reinhard Zumkeller_, Aug 03 2013 %Y A100428 Cf. A100429, A216345. %K A100428 nonn,easy %O A100428 1,2 %A A100428 _N. J. A. Sloane_, Nov 20 2004 %E A100428 More terms from _Joshua Zucker_, May 12 2006 %E A100428 Offset changed by _Reinhard Zumkeller_, Aug 03 2013