id:A111123 - OEIS Search Results

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

+0
1

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; listen)

	OFFSET	`1,2`
	FORMULA	`a(1)+a(2)+...+a(n)=A042942(n+1)-1`
	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 this_sequence A087729 A039890 A152948` `Adjacent sequences: A111120 A111121 A111122 this_sequence A111124 A111125 A111126`
	KEYWORD	`more,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 16 2005`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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