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| n | a(n) |
|---|---|
| 1 | 2520 |
| 2 | 187530840 |
| 3 | 31082452632000 |
| 4 | 7373018003758407000 |
| 5 | 2144953893641078315315520 |
| 6 | 712008996110160366168717566400 |
| 7 | 259207529217195001892051045386944000 |
[2520,187530840,31082452632000, 7373018003758407000,2144953893641078315315520, 712008996110160366168717566400, 259207529217195001892051045386944000] |