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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 8 |
| 4 | 48 |
| 5 | 96 |
| 6 | 1152 |
| 7 | 9216 |
| 8 | 1658880 |
| 9 | 3317760 |
| 10 | 92897280 |
| 11 | 2786918400 |
| 12 | 100329062400 |
| 13 | 802632499200 |
| 14 | 370816214630400 |
| 15 | 741632429260800 |
| 16 | 2966529717043200 |
| 17 | 29665297170432000 |
| 18 | 355983566045184000 |
[1,2,8,48,96,1152,9216,1658880,3317760,92897280, 2786918400,100329062400,802632499200, 370816214630400,741632429260800,2966529717043200, 29665297170432000,355983566045184000] |