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.

A321050 Number of permutations of [n] with no fixed points where the maximal displacement of an element equals four.

Table of values

n a(n)
4 0
5 20
6 111
7 396
8 1285
9 4312
10 15437
11 55572
12 196288
13 678270
14 2311191
15 7856610
16 26732463
17 90996552
18 309390463
19 1049670138
20 3554983881
21 12027825752
22 40676758809
23 137534141216
24 464908099716
25 1571078027012
26 5307751810223
27 17928124690902
28 60548310641344

List of values

[0, 20, 111, 396, 1285, 4312, 15437, 55572, 196288, 678270, 2311191, 7856610, 26732463, 90996552, 309390463, 1049670138, 3554983881, 12027825752, 40676758809, 137534141216, 464908099716, 1571078027012, 5307751810223, 17928124690902, 60548310641344]

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

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