n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 36 |
5 | 144 |
6 | 400 |
7 | 3600 |
8 | 2822400 |
9 | 16257024 |
10 | 32920473600 |
11 | 823011840000 |
12 | 8129341440000 |
13 | 292656291840000 |
14 | 3877578804363264 |
15 | 58642395498086400 |
16 | 844450495172444160000 |
17 | 54044831691036426240000 |
18 | 1161740555606493757440000 |
19 | 76817130615613056614400 |
[1,1,1,36,144,400,3600,2822400,16257024, 32920473600,823011840000,8129341440000, 292656291840000,3877578804363264, 58642395498086400,844450495172444160000, 54044831691036426240000,1161740555606493757440000, 76817130615613056614400] |