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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 11 |
| 3 | 13 |
| 4 | 7 |
| 5 | 11 |
| 6 | 13 |
| 7 | 259 |
| 8 | 2 |
| 9 | 48 |
| 10 | 1001 |
| 11 | 9901 |
| 12 | 999001 |
| 13 | 101 |
| 14 | 9901 |
| 15 | 999001 |
| 16 | 999001 |
| 17 | 999999000001 |
| 18 | 100000042609376 |
[2,11,13,7,11,13,259,2,48,1001,9901,999001,101, 9901,999001,999001,999999000001,100000042609376] |