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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 5184 |
| 4 | 1719926784 |
| 5 | 990677827584000000 |
| 6 | 2495937495082991616000000000000 |
| 7 | 58001506007267709490243656115814400000000000000 |
| 8 | 23264754073069200132851692722771970253637181903994880000000000000000 |
[1,8,5184,1719926784,990677827584000000, 2495937495082991616000000000000, 58001506007267709490243656115814400000000000000, 23264754073069200132851692722771970253637181903994\ 880000000000000000] |