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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 23 |
| 3 | 233 |
| 4 | 2333 |
| 5 | 23333 |
| 6 | 2333321 |
| 7 | 233332117 |
| 8 | 2333321173 |
| 9 | 233332117313 |
| 10 | 23333211731399 |
| 11 | 2333321173139903 |
| 12 | 2333321173139903173 |
| 13 | 23333211731399031733 |
| 14 | 2333321173139903173301 |
| 15 | 2333321173139903173301021 |
[2,23,233,2333,23333,2333321,233332117,2333321173, 233332117313,23333211731399,2333321173139903, 2333321173139903173,23333211731399031733, 2333321173139903173301,2333321173139903173301021] |