A074274 Gaps between even number of 1's in the Kolakoski sequence A000002.

3, 6, 3, 4, 3, 5, 3, 3, 6, 3, 5, 3, 4, 4, 5, 4, 3, 5, 3, 6, 3, 6, 3, 4, 3, 5, 4, 3, 5, 3, 4, 3, 3, 6, 3, 5, 4, 5, 3, 4, 4, 5, 3, 3, 5, 3, 4, 3, 5, 3, 6, 3, 6, 3, 3, 4, 3, 6, 3, 5, 3, 4, 3, 3, 6, 3, 5, 3, 3, 6, 3, 5, 3, 4, 5, 4, 4, 5, 4, 3, 5, 3, 6, 3, 5, 4, 4

Offset

1,1

Comments

First differences of A074273.

3 <= a(n) <= 6 for all n. - Nathaniel Johnston, May 02 2011

Links

Nathaniel Johnston, Table of n, a(n) for n = 1..10000

Example

The Kolakoski sequence begins: 1,2,2,1,1,2,1,2,2,1,2,2,1,1,..., which has an even numbers of 1's (A074273) at 4, 7, 13, so the gaps are 3 and 6.

Crossrefs

Cf. A074273.

Sequence in context: A155503 A010619 A019715 * A111461 A111762 A185582

Adjacent sequences: A074271 A074272 A074273 * A074275 A074276 A074277

Keyword

nonn,easy

Author

Jon Perry, Sep 21 2002

Status

approved