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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 13 |
| 3 | 17 |
| 4 | 19 |
| 5 | 143 |
| 6 | 473 |
| 7 | 419645 |
| 8 | 17913329 |
| 9 | 27479459 |
| 10 | 4113856765 |
| 11 | 9696564647 |
| 12 | 17207135705 |
| 13 | 21202976255 |
[11,13,17,19,143,473,419645,17913329,27479459, 4113856765,9696564647,17207135705,21202976255] |