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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 11 |
| 4 | 13 |
| 5 | 331 |
| 6 | 599 |
| 7 | 18839 |
| 8 | 23747 |
| 9 | 24371 |
| 10 | 29339 |
| 11 | 32141 |
| 12 | 67421 |
[2,5,11,13,331,599,18839,23747,24371,29339,32141, 67421] |