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| n | a(n) |
|---|---|
| 1 | 108053748 |
| 2 | 5530809140 |
| 3 | 310518886748 |
| 4 | 13020576504578 |
| 5 | 852919335897276 |
[108053748,5530809140,310518886748,13020576504578, 852919335897276] |