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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 99 |
| 3 | 171 |
| 4 | 252 |
| 5 | 333 |
| 6 | 414 |
| 7 | 585 |
| 8 | 666 |
| 9 | 747 |
| 10 | 828 |
| 11 | 909 |
| 12 | 999 |
| 13 | 1881 |
| 14 | 2772 |
| 15 | 3663 |
| 16 | 4554 |
| 17 | 5445 |
| 18 | 6336 |
| 19 | 7227 |
| 20 | 8118 |
| 21 | 9009 |
| 22 | 9999 |
| 23 | 10701 |
| 24 | 11511 |
| 25 | 12321 |
| 26 | 13131 |
| 27 | 14841 |
| 28 | 15651 |
| 29 | 16461 |
| 30 | 17271 |
| 31 | 18081 |
| 32 | 18981 |
| 33 | 19791 |
| 34 | 20502 |
| 35 | 21312 |
| 36 | 22122 |
| 37 | 23832 |
| 38 | 24642 |
| 39 | 25452 |
| 40 | 26262 |
[9,99,171,252,333,414,585,666,747,828,909,999, 1881,2772,3663,4554,5445,6336,7227,8118,9009,9999, 10701,11511,12321,13131,14841,15651,16461,17271, 18081,18981,19791,20502,21312,22122,23832,24642, 25452,26262] |