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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 7 |
| 4 | 31 |
| 5 | 31 |
| 6 | 211 |
| 7 | 211 |
| 8 | 211 |
| 9 | 211 |
| 10 | 2311 |
| 11 | 2311 |
| 12 | 120121 |
| 13 | 120121 |
| 14 | 120121 |
| 15 | 120121 |
| 16 | 4084081 |
| 17 | 4084081 |
| 18 | 106696591 |
| 19 | 106696591 |
| 20 | 106696591 |
| 21 | 106696591 |
| 22 | 892371481 |
| 23 | 892371481 |
| 24 | 892371481 |
| 25 | 892371481 |
| 26 | 892371481 |
| 27 | 892371481 |
| 28 | 71166625531 |
| 29 | 71166625531 |
| 30 | 200560490131 |
| 31 | 200560490131 |
[3,7,7,31,31,211,211,211,211,2311,2311,120121, 120121,120121,120121,4084081,4084081,106696591, 106696591,106696591,106696591,892371481,892371481, 892371481,892371481,892371481,892371481, 71166625531,71166625531,200560490131,200560490131] |