A100429 Bisection of Kolakoski sequence A000002.

2, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 2, 2, 1, 1, 2, 1, 2, 2, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 2, 1, 1, 2, 2, 1, 2, 1, 2, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 2, 2, 1, 2, 2, 1, 1, 2, 1, 2, 2, 1, 1, 2, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 2, 2, 1, 2

Offset: 1

Author

N. J. A. Sloane, Nov 20 2004

Keywords

• nonn
• easy

Comments

Lengths of runs of twos in A000002. - Reinhard Zumkeller, Aug 03 2013

As in the Kolakoski sequence itself, the length of runs in this sequence is 1 or 2 (see A100428). - Jean-Christophe Hervé, Oct 04 2014

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A100428, A216345.

Programs

Haskell

a100429 n = a100429_list !! n
a100429_list = g a000002_list where g (_:v:vs) = v : g vs
-- Reinhard Zumkeller, Aug 03 2013

Extensions

More terms from Joshua Zucker, May 12 2006

Offset changed by Reinhard Zumkeller, Aug 03 2013