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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 7 |
| 3 | 7 |
| 4 | 853 |
| 5 | 1286220583 |
| 6 | 178706126107 |
| 7 | 888895528231807 |
| 8 | 16197229696176289 |
[7,7,7,853,1286220583,178706126107, 888895528231807,16197229696176289] |