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.

A356012 a(n) = n! / (6 * floor(n/3)).

Table of values

n a(n)
3 1
4 4
5 20
6 60
7 420
8 3360
9 20160
10 201600
11 2217600
12 19958400
13 259459200
14 3632428800
15 43589145600
16 697426329600
17 11856247603200
18 177843714048000
19 3379030566912000
20 67580611338240000
21 1216451004088320000
22 26761922089943040000
23 615524208068689920000

List of values

[1, 4, 20, 60, 420, 3360, 20160, 201600, 2217600, 19958400, 259459200, 3632428800, 43589145600, 697426329600, 11856247603200, 177843714048000, 3379030566912000, 67580611338240000, 1216451004088320000, 26761922089943040000, 615524208068689920000]

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

Content is available under The OEIS End-User License Agreement.