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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 17 |
| 3 | 189 |
| 4 | 2 |
| 5 | 18 |
| 6 | 2 |
| 7 | 4938270 |
| 8 | 15432 |
| 9 | 87668 |
| 10 | 3456789 |
| 11 | 11223344455667788991 |
[12,17,189,2,18,2,4938270,15432,87668,3456789, 11223344455667788991] |