A187199 Parse the Kolakoski sequence A000002 into distinct phrases 1, 2, 21, 12, 122, 1221, 121, 12212, 11, ...; a(n) = length of n-th phrase.

1, 1, 2, 2, 3, 4, 3, 5, 2, 3, 3, 4, 6, 3, 6, 4, 2, 5, 4, 6, 4, 3, 5, 7, 4, 5, 7, 5, 4, 6, 6, 5, 5, 6, 6, 4, 8, 5, 5, 9, 10, 7, 9, 8, 7, 5, 8, 11, 5, 6, 6, 7, 8, 7, 6, 6, 7, 7, 7, 9, 4, 4, 8, 8, 10, 5, 7, 8, 7, 9, 8, 12, 6, 10, 6, 8, 6, 10, 7, 9, 9, 8, 7, 8, 7, 9, 8, 7, 8, 8, 9, 9, 10, 8, 10, 9, 8, 11, 5, 6

Offset: 1

Author

N. J. A. Sloane, Mar 06 2011

Keywords

• nonn

Links

• Rémy Sigrist, Table of n, a(n) for n = 1..10000
• Rémy Sigrist, PARI program

Crossrefs

Cf. A000002, A007782, A109337, A187180-A187188, A187200.

Programs

PARI

\\ See Links section.