A141081 Number of (6,2)-noncrossing partitions of [n].

1, 1, 2, 5, 15, 52, 203, 877, 4139, 21111, 115219, 666388, 4045991

Offset

0,3

Links

Table of n, a(n) for n=0..12.

Toufik Mansour and Simone Severini, Enumeration of (k,2)-noncrossing partitions, Discrete Math., 308 (2008), 4570-4577.

Crossrefs

A row of A125311.

Sequence in context: A287256 A287668 A099262 * A108305 A229224 A343668

Adjacent sequences: A141078 A141079 A141080 * A141082 A141083 A141084

Keyword

nonn,more

Author

N. J. A. Sloane, Sep 04 2008

Status

approved