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.

A323801 Number of permutations p of [n] such that max_{j=1..n} |p(j)-j| = 5.

Table of values

n a(n)
5 0
6 216
7 1818
8 10402
9 50879
10 234061
11 1076807
12 5090497
13 24239396
14 114890044
15 539033760
16 2502282836
17 11522663348
18 52848995167
19 241925339959
20 1106164932006
21 5052307570906
22 23047344846397
23 104994467312301
24 477733956914534
25 2171607914492408
26 9864023776496558

List of values

[0, 216, 1818, 10402, 50879, 234061, 1076807, 5090497, 24239396, 114890044, 539033760, 2502282836, 11522663348, 52848995167, 241925339959, 1106164932006, 5052307570906, 23047344846397, 104994467312301, 477733956914534, 2171607914492408, 9864023776496558]

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

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