n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 18 |
5 | 24 |
6 | 480 |
7 | 720 |
8 | 23520 |
9 | 100800 |
10 | 1874880 |
11 | 3628800 |
12 | 341953920 |
13 | 479001600 |
14 | 36739422720 |
15 | 468583315200 |
16 | 8960682931200 |
17 | 20922789888000 |
18 | 4289844445286400 |
19 | 6402373705728000 |
20 | 1012647189038284800 |
21 | 18895538930171904000 |
22 | 350378437544239104000 |
[1,1,1,2,18,24,480,720,23520,100800,1874880, 3628800,341953920,479001600,36739422720, 468583315200,8960682931200,20922789888000, 4289844445286400,6402373705728000, 1012647189038284800,18895538930171904000, 350378437544239104000] |