A111123 - OEIS

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A111123

Number of 2's in n-th "Kolakoski" string defined in A054349.

1, 2, 2, 3, 5, 8, 11, 16, 25, 38, 57, 85, 127, 192, 289, 430, 644, 966, 1450, 2173, 3263, 4899, 7341, 11022, 16526, 24802, 37201, 55808, 83702, 125541, 188301, 282444, 423683, 635569, 953356, 1429969, 2144990, 3217454 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	LINKS	`Table of n, a(n) for n=1..38.`
	FORMULA	`a(1)+a(2)+...+a(n)=A042942(n+1)-1` `First differences of the sequence A001083. [From Benoit Cloitre, Nov 07 2010]`
	MATHEMATICA	`l = { (terms in A042942) }; For[i = 2, i <= Length[l], i++, Print[l[[i]] - l[[i - 1]]]]`
	CROSSREFS	`Sequence in context: A267419 A076777 A240210 * A261091 A179523 A087729` `Adjacent sequences: A111120 A111121 A111122 * A111124 A111125 A111126`
	KEYWORD	`more,nonn`
	AUTHOR	`Benoit Cloitre, Oct 16 2005`
	STATUS	`approved`

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Last modified January 17 23:37 EST 2020. Contains 330995 sequences. (Running on oeis4.)