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A264322 Number of permutations of [n] with exactly three (possibly overlapping) occurrences of the consecutive pattern 3412. 2
1, 48, 1520, 38452, 869740, 18720732, 396975296, 8458711900, 183197270195, 4060222577980, 92457026432364, 2168229942019192, 52433345808131318, 1308330112118893072, 33691149632085370112, 895280698879996177240, 24542614402374373350957, 693775997089974201665016 (list; graph; refs; listen; history; text; internal format)
OFFSET

8,2

LINKS

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

EXAMPLE

a(8) = 1: 78563412.

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

CROSSREFS

Column k=3 of A264319.

Sequence in context: A160368 A275042 A062195 * A329776 A266160 A004386

Adjacent sequences:  A264319 A264320 A264321 * A264323 A264324 A264325

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Nov 11 2015

STATUS

approved

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Last modified September 22 21:07 EDT 2020. Contains 337291 sequences. (Running on oeis4.)