A143590 Length of row n of A143589 (a Kolakoski fan).

1, 1, 2, 2, 3, 4, 7, 10, 16, 24, 36, 54, 80, 120, 180, 269, 404, 605, 908, 1361, 2041, 3063, 4591, 6890, 10333, 15509, 23259, 34901, 52344, 78516, 117762, 176636, 264944, 397405, 596099, 894193, 1341290, 2011935, 3017927, 4526825

Offset

1,3

Comments

Conjecture (following Benoit Cloitre's conjecture at A111090):

if L=A143489, then L(n)*(2/3)^n approaches a constant.

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. Their
lengths are 1,1,2,2,3,4.

Crossrefs

Cf. A000002, A111090, A143477, A143586, A143489.

Sequence in context: A003179 A153934 A361440 * A336030 A245620 A059348

Adjacent sequences: A143587 A143588 A143589 * A143591 A143592 A143593

Keyword

nonn

Author

Clark Kimberling, Aug 25 2008

Status

approved