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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 17 |
| 5 | 19 |
| 6 | 23 |
| 7 | 37 |
| 8 | 41 |
| 9 | 137 |
| 10 | 139 |
| 11 | 163 |
| 12 | 167 |
| 13 | 263 |
| 14 | 293 |
| 15 | 977 |
| 16 | 1171 |
| 17 | 1847 |
| 18 | 2053 |
| 19 | 6841 |
[2,3,5,17,19,23,37,41,137,139,163,167,263,293,977, 1171,1847,2053,6841] |