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.

A000380 Number of permutations of an n-sequence discordant with three given permutations (see reference) in n-3 places.

Table of values

n a(n)
3 6
4 8
5 40
6 176
7 1421
8 10352
9 93114
10 912920
11 9929997
12 117970704
13 1521176826
14 21150414880
15 315400444070
16 5020920314016
17 84979755347122
18 1523710321272384
19 28851091193764023
20 575253584489378040
21 12047084261153160394
22 264377395040950523112
23 6066972656940255290199

List of values

[6, 8, 40, 176, 1421, 10352, 93114, 912920, 9929997, 117970704, 1521176826, 21150414880, 315400444070, 5020920314016, 84979755347122, 1523710321272384, 28851091193764023, 575253584489378040, 12047084261153160394, 264377395040950523112, 6066972656940255290199]

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

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