A229729 Number of separable permutations with exactly four occurrences of the 1-box pattern.

0, 0, 0, 0, 8, 42, 178, 664, 2288

Offset

0,5

Comments

See Kitaev-Remmel for precise definition.

Links

Table of n, a(n) for n=0..8.

S. Kitaev and J. Remmel, The 1-box pattern on pattern avoiding permutations, arXiv preprint arXiv:1305.6970 [math.CO], 2013.

Crossrefs

Cf. A229730.

Sequence in context: A256861 A287221 A119965 * A055082 A266940 A212337

Adjacent sequences: A229726 A229727 A229728 * A229730 A229731 A229732

Keyword

nonn,more

Author

N. J. A. Sloane, Oct 01 2013

Status

approved