cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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

Table of values

n a(n)
8 1
9 48
10 1520
11 38452
12 869740
13 18720732
14 396975296
15 8458711900
16 183197270195
17 4060222577980
18 92457026432364
19 2168229942019192
20 52433345808131318
21 1308330112118893072
22 33691149632085370112
23 895280698879996177240
24 24542614402374373350957
25 693775997089974201665016

List of values

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

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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