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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 13 |
| 5 | 17 |
| 6 | 23 |
| 7 | 37 |
| 8 | 43 |
| 9 | 73 |
| 10 | 79 |
| 11 | 89 |
| 12 | 127 |
| 13 | 239 |
| 14 | 409 |
| 15 | 2543 |
| 16 | 10837 |
| 17 | 24749 |
| 18 | 29879 |
| 19 | 181913 |
[3,5,7,13,17,23,37,43,73,79,89,127,239,409,2543, 10837,24749,29879,181913] |