A074290 Difference between Kolakoski(n)=A000002(n) and 1 (n odd) or 2 (n even).

0, 0, 1, -1, 0, 0, 0, 0, 1, -1, 1, 0, 0, -1, 1, -1, 0, 0, 1, -1, 1, -1, 0, 0, 0, 0, 1, -1, 0, 0, 0, -1, 1, -1, 1, 0, 0, 0, 1, -1, 0, 0, 0, 0, 1, -1, 1, -1, 0, 0, 0, -1, 1, 0, 0, 0, 1, -1, 0, 0, 0, 0, 1, -1, 1, 0, 0, -1, 1, -1, 0, 0, 0, 0, 1, -1, 1, -1, 0, 0, 1

Offset

1

Links

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

Example

Kolakoski (A000002): 1,2,2,1,1,2,1,2,... Subtracting 1,2,1,2,1,2,1,2,... we get 0,0,1,-1,0,0,0,0,...

Crossrefs

Cf. A074291.

Sequence in context: A262684 A373263 A287382 * A091225 A175337 A285031

Adjacent sequences: A074287 A074288 A074289 * A074291 A074292 A074293

Keyword

sign,easy

Author

Jon Perry, Sep 21 2002

Extensions

Offset corrected by Nathaniel Johnston, May 02 2011

Status

approved