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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 9 |
| 3 | 49 |
| 4 | 89 |
| 5 | 489 |
| 6 | 889 |
| 7 | 4889 |
| 8 | 8889 |
| 9 | 48889 |
| 10 | 88889 |
| 11 | 488889 |
| 12 | 888889 |
| 13 | 4888889 |
| 14 | 8888889 |
| 15 | 48888889 |
| 16 | 88888889 |
| 17 | 488888889 |
| 18 | 888888889 |
| 19 | 4888888889 |
| 20 | 8888888889 |
| 21 | 48888888889 |
| 22 | 88888888889 |
| 23 | 488888888889 |
| 24 | 888888888889 |
| 25 | 4888888888889 |
| 26 | 8888888888889 |
| 27 | 48888888888889 |
| 28 | 88888888888889 |
[1,5,9,49,89,489,889,4889,8889,48889,88889,488889, 888889,4888889,8888889,48888889,88888889, 488888889,888888889,4888888889,8888888889, 48888888889,88888888889,488888888889,888888888889, 4888888888889,8888888888889,48888888888889, 88888888888889] |