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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 70 |
| 3 | 33395 |
| 4 | 56878758 |
| 5 | 252566336705 |
| 6 | 2426875246270330 |
| 7 | 44531120457328688514 |
[1,70,33395,56878758,252566336705, 2426875246270330,44531120457328688514] |