n | a(n) |
---|---|
1 | -1 |
2 | -1 |
3 | 3 |
4 | 132 |
5 | 4260 |
6 | 172440 |
7 | 9069480 |
8 | 609618240 |
9 | 51209444160 |
10 | 5267273961600 |
11 | 651825357321600 |
12 | 95601055094899200 |
13 | 16405141092269529600 |
14 | 3257166195621552614400 |
15 | 741005309513165913216000 |
[-1,-1,3,132,4260,172440,9069480,609618240, 51209444160,5267273961600,651825357321600, 95601055094899200,16405141092269529600, 3257166195621552614400,741005309513165913216000] |