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; internal format)

	OFFSET	`1,2`
	FORMULA	`a(1)+a(2)+...+a(n)=A042942(n+1)-1` `First differences of the sequence A001083. [From Benoit Cloitre (benoit7848c(AT)orange.fr), 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: A157176 A111181 A076777 * A179523 A087729 A039890` `Adjacent sequences: A111120 A111121 A111122 * A111124 A111125 A111126`
	KEYWORD	`more,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 16 2005`

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Last modified February 17 14:17 EST 2012. Contains 206036 sequences.