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| n | a(n) |
|---|---|
| 3 | 64 |
| 4 | 1600 |
| 5 | 57600 |
| 6 | 2822400 |
| 7 | 180633600 |
| 8 | 14631321600 |
| 9 | 1463132160000 |
| 10 | 177038991360000 |
| 11 | 25493614755840000 |
| 12 | 4308420893736960000 |
| 13 | 844450495172444160000 |
| 14 | 190001361413799936000000 |
| 15 | 48640348521932783616000000 |
| 16 | 14057060722838574465024000000 |
[64,1600,57600,2822400,180633600,14631321600, 1463132160000,177038991360000,25493614755840000, 4308420893736960000,844450495172444160000, 190001361413799936000000, 48640348521932783616000000, 14057060722838574465024000000] |