A072660 Size of the parenthesizations obtained with the global ranking/unranking scheme A072656-A072659.

0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 3, 5, 4, 4, 4, 5, 4, 4, 6, 5, 5, 5, 5, 4, 6, 5, 4, 4, 5, 7, 6, 6, 6, 5, 5, 5, 6, 5, 5, 7, 6, 6, 6, 5, 4, 6, 5, 8, 7, 7, 7, 6, 7, 6, 6, 6, 6, 5, 7, 6, 5, 4, 6, 8, 7, 7, 7, 6, 6, 5, 7, 5, 5, 8, 6, 6, 9, 8, 8, 8, 7, 8, 7, 7, 9, 7, 7, 7, 6, 6, 5, 7, 5, 6, 8, 7, 7, 6, 6, 4, 7, 5, 9, 8

Offset

0,3

Links

Table of n, a(n) for n=0..104.

Crossrefs

Cf. A072657-A072659. Permutations: A071673, A072643, A072644, A072645.

Sequence in context: A072768 A071673 A174199 * A237720 A075172 A347643

Adjacent sequences: A072657 A072658 A072659 * A072661 A072662 A072663

Keyword

nonn

Author

Antti Karttunen, Jun 02 2002

Status

approved