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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 7 |
| 6 | 11 |
| 7 | 19 |
| 8 | 23 |
| 9 | 31 |
| 10 | 43 |
| 11 | 59 |
| 12 | 71 |
| 13 | 79 |
| 14 | 103 |
| 15 | 131 |
| 16 | 191 |
| 17 | 211 |
| 18 | 331 |
| 19 | 463 |
[1,2,3,5,7,11,19,23,31,43,59,71,79,103,131,191, 211,331,463] |