n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 60 |
5 | 360 |
6 | 2520 |
7 | 20160 |
8 | 19958400 |
9 | 239500800 |
10 | 3113510400 |
11 | 43589145600 |
12 | 177843714048000 |
13 | 3201186852864000 |
14 | 60822550204416000 |
15 | 1216451004088320000 |
16 | 12926008369442488320000 |
17 | 310224200866619719680000 |
18 | 4420880996869850977271808000000 |
[1,3,12,60,360,2520,20160,19958400,239500800, 3113510400,43589145600,177843714048000, 3201186852864000,60822550204416000, 1216451004088320000,12926008369442488320000, 310224200866619719680000, 4420880996869850977271808000000] |