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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 111 |
| 3 | 38801 |
| 4 | 2445586864035 |
| 5 | 1080118354441207408343642986146950633 |
[15,111,38801,2445586864035, 1080118354441207408343642986146950633] |