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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 70 |
| 3 | 34650 |
| 4 | 62987418 |
| 5 | 303953291280 |
| 6 | 3208757131366020 |
| 7 | 65143699363358402128 |
[1,70,34650,62987418,303953291280, 3208757131366020,65143699363358402128] |