The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 9 |
| 1 | 81 |
| 2 | 801 |
| 3 | 8001 |
| 4 | 80001 |
| 5 | 800001 |
| 6 | 8000001 |
| 7 | 80000001 |
| 8 | 800000001 |
| 9 | 8000000001 |
| 10 | 80000000001 |
| 11 | 800000000001 |
| 12 | 8000000000001 |
| 13 | 80000000000001 |
| 14 | 800000000000001 |
| 15 | 8000000000000001 |
| 16 | 80000000000000001 |
| 17 | 800000000000000001 |
| 18 | 8000000000000000001 |
| 19 | 80000000000000000001 |
| 20 | 800000000000000000001 |
[9,81,801,8001,80001,800001,8000001,80000001, 800000001,8000000001,80000000001,800000000001, 8000000000001,80000000000001,800000000000001, 8000000000000001,80000000000000001, 800000000000000001,8000000000000000001, 80000000000000000001,800000000000000000001] |