| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 3906 |
| 7 | 12714681 |
| 8 | 40053706056 |
| 9 | 125368356709806 |
| 10 | 391901483074853556 |
| 11 | 1224770494838892134806 |
| 12 | 3827456772141158994166056 |
| 13 | 11960833022875371081037525431 |
| 14 | 37377622327704219905090668384806 |
| 15 | 116805081731088587940522831693775431 |
[1,3906,12714681,40053706056,125368356709806, 391901483074853556,1224770494838892134806, 3827456772141158994166056, 11960833022875371081037525431, 37377622327704219905090668384806, 116805081731088587940522831693775431] |