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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 16 |
| 3 | 216 |
| 4 | 2085136 |
| 5 | 62019685191371643 |
| 6 | 82626753081964483505319130781618465733184 |
[6,16,216,2085136,62019685191371643, 82626753081964483505319130781618465733184] |