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.

A213324 Number of permutations of n objects such that no five-element subset is preserved.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 24
5 0
6 265
7 2260
8 20145
9 200240
10 2492225
11 23163480
12 270877705
13 3449462080
14 48030998625
15 713129276000
16 11685451112225
17 198919432944000
18 3585292622812225
19 68053546078588000
20 1360638669122771625
21 28525836193802883200
22 627637954389517169825
23 14435957818250131813200
24 346518764145610187160625

List of values

[1, 1, 2, 6, 24, 0, 265, 2260, 20145, 200240, 2492225, 23163480, 270877705, 3449462080, 48030998625, 713129276000, 11685451112225, 198919432944000, 3585292622812225, 68053546078588000, 1360638669122771625, 28525836193802883200, 627637954389517169825, 14435957818250131813200, 346518764145610187160625]

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

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