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.

A264454 Number of permutations of [n] with exactly five (possibly overlapping) occurrences of the generalized pattern 12-3.

Table of values

n a(n)
5 1
6 24
7 337
8 3798
9 38795
10 379611
11 3659389
12 35291284
13 343556139
14 3394140548
15 34141603945
16 350367304972
17 3672490264985
18 39344027488644
19 430933818393770
20 4825995839698429
21 55254816421477438
22 646659542446548212
23 7733703865241542989
24 94486241595833611364

List of values

[1, 24, 337, 3798, 38795, 379611, 3659389, 35291284, 343556139, 3394140548, 34141603945, 350367304972, 3672490264985, 39344027488644, 430933818393770, 4825995839698429, 55254816421477438, 646659542446548212, 7733703865241542989, 94486241595833611364]