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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 17 |
| 6 | 31 |
| 7 | 71 |
| 8 | 127 |
| 9 | 157 |
| 10 | 227 |
| 11 | 257 |
| 12 | 293 |
| 13 | 349 |
| 14 | 419 |
| 15 | 503 |
| 16 | 1993 |
| 17 | 7907 |
| 18 | 26293 |
| 19 | 29311 |
| 20 | 34603 |
| 21 | 67477 |
| 22 | 3147311 |
| 23 | 9159547 |
| 24 | 973669469 |
| 25 | 6797534657 |
| 26 | 9627183689 |
| 27 | 297222052181 |
| 28 | 4530692779838851 |
| 29 | 41748646469705167 |
| 30 | 266359428042546661 |
[2,3,5,7,17,31,71,127,157,227,257,293,349,419,503, 1993,7907,26293,29311,34603,67477,3147311,9159547, 973669469,6797534657,9627183689,297222052181, 4530692779838851,41748646469705167, 266359428042546661] |