A201642 - OEIS

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A201642

Successive generations of the variant of the Kolakoski sequence.

0

1, 12, 1211, 121121, 121121221, 12112122122112, 1211212212211211221211, 121121221221121122121121221121121, 1211212212211211221211212211211212212211212212112, 12112122122112112212112122112112122122112122121121122122112122122112112122

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

COMMENTS

Word lengths give A042942.

LINKS

Table of n, a(n) for n=0..9.

Eric Weisstein's World of Mathematics, Kolakoski Sequence

FORMULA

Generate A006928 via 1 -> 12 -> 1211 -> 121121 -> 121121221 -> ....

CROSSREFS

Cf. A006928, A000002.

Sequence in context: A180586 A178529 A360502 * A177090 A103269 A317955

Adjacent sequences: A201639 A201640 A201641 * A201643 A201644 A201645

KEYWORD

easy,nonn,changed

AUTHOR

Arkadiusz Wesolowski, Oct 09 2012

STATUS

approved