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| n | a(n) |
|---|---|
| 1 | 120 |
| 2 | 672 |
| 3 | 45840 |
| 4 | 51168 |
| 5 | 523776 |
| 6 | 459818240 |
| 7 | 1476304896 |
| 8 | 51001180160 |
[120,672,45840,51168,523776,459818240,1476304896, 51001180160] |