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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 11 |
| 5 | 13 |
| 6 | 17 |
| 7 | 19 |
| 8 | 31 |
| 9 | 37 |
| 10 | 41 |
| 11 | 61 |
| 12 | 73 |
| 13 | 97 |
| 14 | 109 |
| 15 | 151 |
| 16 | 241 |
| 17 | 257 |
| 18 | 331 |
[3,5,7,11,13,17,19,31,37,41,61,73,97,109,151,241, 257,331] |