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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 5 |
| 6 | 7 |
| 7 | 7 |
| 8 | 199 |
| 9 | 199 |
| 10 | 199 |
| 11 | 110437 |
| 12 | 110437 |
| 13 | 4943 |
| 14 | 31385539 |
| 15 | 115453391 |
| 16 | 53297929 |
| 17 | 3430751869 |
| 18 | 4808316343 |
| 19 | 8297644387 |
| 20 | 214861583621 |
| 21 | 5749146449311 |
[2,2,3,5,5,7,7,199,199,199,110437,110437,4943, 31385539,115453391,53297929,3430751869,4808316343, 8297644387,214861583621,5749146449311] |