A141080 Number of (5,2)-noncrossing partitions of [n].

1, 1, 2, 5, 15, 52, 203, 876, 4112, 20679, 109853, 608996, 3488806

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: A287255 A284727 A056273 * A366774 A287667 A192855

Adjacent sequences: A141077 A141078 A141079 * A141081 A141082 A141083

Keyword

nonn,more

Author

N. J. A. Sloane, Sep 04 2008

Status

approved