A264320 Number of permutations of [n] with exactly one occurrence of the consecutive pattern 3412.

1, 10, 88, 794, 7639, 79164, 885128, 10657588, 137752283, 1904555934, 28068929900, 439495830750, 7288494061255, 127654030808304, 2355066281798588, 45655570757683888, 927984709909530539, 19735811069218548106, 438344811235148801632, 10149979837759608190794

Offset

4,2

Links

Alois P. Heinz, Table of n, a(n) for n = 4..200

Example

a(4) = 1: 3412.
a(5) = 10: 14523, 24513, 34125, 34512, 35124, 43512, 45123, 45132, 45231, 53412.

Crossrefs

Column k=1 of A264319.

Sequence in context: A273585 A165148 A287828 * A298134 A163030 A302149

Adjacent sequences: A264317 A264318 A264319 * A264321 A264322 A264323

Keyword

nonn

Author

Alois P. Heinz, Nov 11 2015

Status

approved