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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 11 |
| 4 | 13 |
| 5 | 17 |
| 6 | 19 |
| 7 | 23 |
| 8 | 31 |
| 9 | 41 |
| 10 | 43 |
| 11 | 61 |
| 12 | 67 |
| 13 | 71 |
| 14 | 73 |
| 15 | 103 |
| 16 | 163 |
| 17 | 223 |
| 18 | 311 |
| 19 | 313 |
| 20 | 373 |
| 21 | 521 |
| 22 | 523 |
| 23 | 823 |
| 24 | 1123 |
| 25 | 1873 |
| 26 | 5623 |
| 27 | 20089 |
| 28 | 28123 |
[3,7,11,13,17,19,23,31,41,43,61,67,71,73,103,163, 223,311,313,373,521,523,823,1123,1873,5623,20089, 28123] |