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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 222 |
| 3 | 3333 |
| 4 | 44444 |
| 5 | 555555 |
| 6 | 6666666 |
| 7 | 77777777 |
| 8 | 888888888 |
| 9 | 9999999999 |
| 10 | 11888888888 |
| 11 | 119999999999 |
| 12 | 222888888888 |
| 13 | 2229999999999 |
| 14 | 3333888888888 |
| 15 | 33339999999999 |
| 16 | 44444888888888 |
| 17 | 444449999999999 |
| 18 | 555555888888888 |
| 19 | 5555559999999999 |
| 20 | 6666666888888888 |
[11,222,3333,44444,555555,6666666,77777777, 888888888,9999999999,11888888888,119999999999, 222888888888,2229999999999,3333888888888, 33339999999999,44444888888888,444449999999999, 555555888888888,5555559999999999,6666666888888888] |