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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 59 |
| 3 | 599 |
| 4 | 59999 |
| 5 | 599999 |
| 6 | 59999999 |
| 7 | 59999999999 |
| 8 | 59999999999999 |
| 9 | 59999999999999999999999 |
| 10 | 599999999999999999999999 |
| 11 | 59999999999999999999999999999 |
| 12 | 59999999999999999999999999999999999 |
[5,59,599,59999,599999,59999999,59999999999, 59999999999999,59999999999999999999999, 599999999999999999999999, 59999999999999999999999999999, 59999999999999999999999999999999999] |