n | a(n) |
---|---|
0 | -2 |
1 | 1 |
2 | 1 |
3 | 9 |
4 | 72 |
5 | 792 |
6 | 10512 |
7 | 165168 |
8 | 2992608 |
9 | 61445088 |
10 | 1409857920 |
11 | 35751525120 |
12 | 992877886080 |
13 | 29970166769280 |
14 | 976990865518080 |
15 | 34206887786803200 |
16 | 1280236466132467200 |
17 | 51004766655793036800 |
18 | 2155155171665039308800 |
[-2,1,1,9,72,792,10512,165168,2992608,61445088, 1409857920,35751525120,992877886080, 29970166769280,976990865518080,34206887786803200, 1280236466132467200,51004766655793036800, 2155155171665039308800] |