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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 70 |
| 3 | 34470 |
| 4 | 61633118 |
| 5 | 290404848165 |
| 6 | 2980163520882356 |
| 7 | 58650349023599896052 |
[1,70,34470,61633118,290404848165, 2980163520882356,58650349023599896052] |