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| n | a(n) |
|---|---|
| 5 | 24 |
| 6 | 864 |
| 7 | 24696 |
| 8 | 688128 |
| 9 | 19840464 |
| 10 | 604727424 |
| 11 | 19632956112 |
| 12 | 680195957760 |
| 13 | 25130679950376 |
| 14 | 988325574652416 |
| 15 | 41277744231187464 |
| 16 | 1826323584590389248 |
| 17 | 85391029667937905184 |
| 18 | 4209030460729215184896 |
| 19 | 218223423136426488339744 |
| 20 | 11875233973816788160610304 |
[24,864,24696,688128,19840464,604727424, 19632956112,680195957760,25130679950376, 988325574652416,41277744231187464, 1826323584590389248,85391029667937905184, 4209030460729215184896,218223423136426488339744, 11875233973816788160610304] |