n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 72 |
5 | 1080 |
6 | 19440 |
7 | 408240 |
8 | 9797760 |
9 | 264539520 |
10 | 7936185600 |
11 | 261894124800 |
12 | 9428188492800 |
13 | 367699351219200 |
14 | 15443372751206400 |
15 | 694951773804288000 |
16 | 33357685142605824000 |
17 | 1701241942272897024000 |
[0,0,0,6,72,1080,19440,408240,9797760,264539520, 7936185600,261894124800,9428188492800, 367699351219200,15443372751206400, 694951773804288000,33357685142605824000, 1701241942272897024000] |