n | a(n) |
---|---|
2 | 1 |
3 | 6 |
4 | 42 |
5 | 330 |
6 | 2970 |
7 | 30240 |
8 | 345240 |
9 | 4377240 |
10 | 61122600 |
11 | 933055200 |
12 | 15470254800 |
13 | 277005128400 |
14 | 5329454130000 |
15 | 109681187616000 |
16 | 2404894892400000 |
17 | 55977698400624000 |
18 | 1378748676601296000 |
19 | 35829233832135744000 |
20 | 979763376201049440000 |
21 | 28124715476056399200000 |
[1,6,42,330,2970,30240,345240,4377240,61122600, 933055200,15470254800,277005128400,5329454130000, 109681187616000,2404894892400000, 55977698400624000,1378748676601296000, 35829233832135744000,979763376201049440000, 28124715476056399200000] |