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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 67 |
| 3 | 649 |
| 4 | 7170 |
| 5 | 76927 |
| 6 | 829137 |
| 7 | 8929364 |
| 8 | 96178466 |
| 9 | 1035919809 |
| 10 | 11157725916 |
| 11 | 120178061288 |
| 12 | 1294418390430 |
| 13 | 13941970850679 |
| 14 | 150166708458945 |
| 15 | 1617421284514207 |
| 16 | 17420982562261441 |
| 17 | 187638580250909660 |
[2,67,649,7170,76927,829137,8929364,96178466, 1035919809,11157725916,120178061288,1294418390430, 13941970850679,150166708458945,1617421284514207, 17420982562261441,187638580250909660] |