A013948 Positions of 2's in Kolakoski sequence (A000002).

2, 3, 6, 8, 9, 11, 12, 15, 18, 19, 21, 24, 26, 27, 30, 33, 35, 36, 38, 39, 42, 44, 45, 47, 50, 53, 54, 56, 57, 60, 62, 63, 65, 66, 69, 72, 74, 75, 77, 80, 81, 83, 84, 87, 89, 90, 92, 93, 96, 99, 100, 102, 105, 107, 108, 110, 111, 114, 117, 119, 120, 123, 126, 127, 129, 132, 135

Offset

1,1

Links

Table of n, a(n) for n=1..67.

Formula

Numbers n such that A078649(A054353(n-1)-n+2)-A054353(n-1)=1. [Benoit Cloitre, Feb 08 2009]

Least k such that A054353(k)>=A078649(n). a(n)=A078649(n)-n+1. [Benoit Cloitre, Feb 07 2009]

Crossrefs

Cf. A000002, A054353, A078649.

Complement: A013947.

Sequence in context: A201822 A093510 A202341 * A187478 A269860 A013952

Adjacent sequences: A013945 A013946 A013947 * A013949 A013950 A013951

Keyword

nonn,easy

Author

Clark Kimberling

Status

approved