n | a(n) |
---|---|
2 | 2 |
3 | 12 |
4 | 12 |
5 | 1120 |
6 | 3360 |
7 | 6720 |
8 | 6720 |
9 | 172972800 |
10 | 1210809600 |
11 | 7264857600 |
12 | 36324288000 |
13 | 145297152000 |
14 | 435891456000 |
15 | 871782912000 |
16 | 871782912000 |
17 | 1676837160768946176000 |
18 | 25152557411534192640000 |
19 | 352135803761478696960000 |
20 | 4577765448899223060480000 |
[2,12,12,1120,3360,6720,6720,172972800,1210809600, 7264857600,36324288000,145297152000,435891456000, 871782912000,871782912000,1676837160768946176000, 25152557411534192640000,352135803761478696960000, 4577765448899223060480000] |