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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 11 |
| 6 | 13 |
| 7 | 17 |
| 8 | 37 |
| 9 | 79 |
| 10 | 113 |
| 11 | 199 |
| 12 | 337 |
| 13 | 1111111111111111111 |
| 14 | 11111111111111111111111 |
[2,3,5,7,11,13,17,37,79,113,199,337, 1111111111111111111,11111111111111111111111] |