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 A088569 Anti-Kolakoski sequence (sequence of run lengths never coincides with the sequence itself). 3
 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 2, 1, 1, 2, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 2, 2, 1, 2, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 2, 1, 2, 1, 1, 2, 1, 2, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 2, 1, 1, 2, 1, 2, 2, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Unique infinite word defined on alphabet {1,2} satisfying: a(1)=1, if a(n)=2 length of n-th run is 1, if a(n)=1 length of n-th run is 2. Kolakoski sequence satisfies the opposite definition: K(1)=1, if K(n)=2 length of n-th run is 2, if K(n)=1 length of n-th run is 1. Equals A049705 without the first term. - Jean-Christophe HervĂ©, Nov 10 2014 LINKS FORMULA a(n) = 3-A000002(n+1) = A049705(n+1). EXAMPLE a(1)=1 hence first run must have length 2 and necessarily a(2)=1. Now second run must have also length 2 and therefore a(3)=a(4)=2. CROSSREFS Cf. A000002, A049705. Sequence in context: A164295 A035214 A071292 * A246144 A192763 A001285 Adjacent sequences:  A088566 A088567 A088568 * A088570 A088571 A088572 KEYWORD nonn AUTHOR Benoit Cloitre, Nov 17 2003 STATUS approved

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Last modified November 14 23:06 EST 2018. Contains 317221 sequences. (Running on oeis4.)