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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 11 |
| 5 | 17 |
| 6 | 19 |
| 7 | 29 |
| 8 | 31 |
| 9 | 79 |
| 10 | 89 |
| 11 | 127 |
| 12 | 1889 |
| 13 | 3511 |
| 14 | 8971 |
| 15 | 13331 |
[3,5,7,11,17,19,29,31,79,89,127,1889,3511,8971, 13331] |