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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 17 |
| 5 | 19 |
| 6 | 109 |
| 7 | 509 |
| 8 | 661 |
| 9 | 709 |
| 10 | 1231 |
| 11 | 12889 |
| 12 | 13043 |
| 13 | 26723 |
| 14 | 43963 |
| 15 | 44789 |
[3,5,7,17,19,109,509,661,709,1231,12889,13043, 26723,43963,44789] |