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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 78 |
| 4 | 920 |
| 5 | 8675 |
| 6 | 77225 |
| 7 | 691255 |
| 8 | 6705498 |
| 9 | 66719462 |
| 10 | 666733325 |
| 11 | 6666747237 |
[1,6,78,920,8675,77225,691255,6705498,66719462, 666733325,6666747237] |