A143591 Number of 1's in row n of A143589 (a Kolakoski fan).

1, 0, 2, 1, 2, 1, 4, 4, 8, 12, 18, 28, 40, 60, 91, 134, 203, 302, 455, 681, 1019, 1535, 2292, 3447, 5157, 7759, 11617, 17458, 26172, 39270, 58888, 88328, 132483, 198711, 298005, 447096, 670645, 1005943, 1509029, 2263285

Offset

1,3

Comments

A143590 = A143591 + A143592.

Links

Table of n, a(n) for n=1..40.

Example

The first 6 rows of A143589 are 1; 2; 1,1; 2,1; 1,1,2; 2,1,2,2. The
respective numbers of 1's are 1,0,2,1,2,1.

Crossrefs

Cf. A000002, A143587, A143589, A143590, A143592.

Sequence in context: A099875 A079499 A166235 * A085063 A263078 A329869

Adjacent sequences: A143588 A143589 A143590 * A143592 A143593 A143594

Keyword

nonn

Author

Clark Kimberling, Aug 25 2008

Status

approved