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.

A120812 Number of permutations of length n with exactly 4 occurrences of the pattern 2-13.

Table of values

n a(n)
5 1
6 44
7 700
8 7460
9 63648
10 470934
11 3155691
12 19660630
13 115855025
14 653392740
15 3556757490
16 18805317960
17 97034823600
18 490465092600
19 2435567286708
20 11910569958216
21 57470522059594
22 274051266477560
23 1293219035408080

List of values

[1, 44, 700, 7460, 63648, 470934, 3155691, 19660630, 115855025, 653392740, 3556757490, 18805317960, 97034823600, 490465092600, 2435567286708, 11910569958216, 57470522059594, 274051266477560, 1293219035408080]

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

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