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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 17 |
| 2 | 5 |
| 3 | 7 |
| 4 | 53 |
| 5 | 197 |
| 6 | 848699 |
| 7 | 2802313 |
| 8 | 24281267 |
| 9 | 54927644129 |
| 10 | 29566753319 |
[2,17,5,7,53,197,848699,2802313,24281267, 54927644129,29566753319] |