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| n | a(n) |
|---|---|
| 1 | 480 |
| 2 | 2688 |
| 3 | 2095104 |
| 4 | 16854816 |
| 5 | 41055200 |
| 6 | 1839272960 |
| 7 | 5905219584 |
| 8 | 204004720640 |
[480,2688,2095104,16854816,41055200,1839272960, 5905219584,204004720640] |