n | a(n) |
---|---|
5 | 1 |
6 | 18 |
7 | 210 |
8 | 2024 |
9 | 17550 |
10 | 142506 |
11 | 1107568 |
12 | 8347680 |
13 | 61523748 |
14 | 445891810 |
15 | 3190187286 |
16 | 22595200368 |
17 | 158753389900 |
18 | 1108176102180 |
19 | 7694644696200 |
20 | 53194089192720 |
21 | 366395202809685 |
22 | 2515943049305400 |
23 | 17231414395464984 |
[1,18,210,2024,17550,142506,1107568,8347680, 61523748,445891810,3190187286,22595200368, 158753389900,1108176102180,7694644696200, 53194089192720,366395202809685,2515943049305400, 17231414395464984] |