A264322 Number of permutations of [n] with exactly three (possibly overlapping) occurrences of the consecutive pattern 3412.

1, 48, 1520, 38452, 869740, 18720732, 396975296, 8458711900, 183197270195, 4060222577980, 92457026432364, 2168229942019192, 52433345808131318, 1308330112118893072, 33691149632085370112, 895280698879996177240, 24542614402374373350957, 693775997089974201665016

Offset: 8

Author

Alois P. Heinz, Nov 11 2015

Keywords

• nonn

Examples

			a(8) = 1: 78563412.
a(9) = 48: 189674523, 289674513, 389674512, ..., 896745132, 896745231, 978563412.
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 8..180

Crossrefs

Column k=3 of A264319.