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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 13 |
| 4 | 31 |
| 5 | 43 |
| 6 | 67 |
| 7 | 73 |
| 8 | 151 |
| 9 | 181 |
| 10 | 211 |
| 11 | 241 |
| 12 | 277 |
| 13 | 331 |
| 14 | 463 |
| 15 | 487 |
| 16 | 1597 |
| 17 | 1831 |
[3,7,13,31,43,67,73,151,181,211,241,277,331,463, 487,1597,1831] |