n | a(n) |
---|---|
1 | -1 |
2 | 20 |
3 | -560 |
4 | 20160 |
5 | -887040 |
6 | 46126080 |
7 | -2767564800 |
8 | 188194406400 |
9 | -14302774886400 |
10 | 1201433090457600 |
11 | -110531844322099200 |
12 | 11053184432209920000 |
13 | -1193743918678671360000 |
14 | 138474294566725877760000 |
15 | -17170812526274008842240000 |
[-1,20,-560,20160,-887040,46126080,-2767564800, 188194406400,-14302774886400,1201433090457600, -110531844322099200,11053184432209920000, -1193743918678671360000,138474294566725877760000, -17170812526274008842240000] |