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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 19 |
| 3 | 20 |
| 4 | 21 |
| 5 | 22 |
| 6 | 39 |
| 7 | 40 |
| 8 | 41 |
| 9 | 59 |
| 10 | 60 |
| 11 | 61 |
| 12 | 79 |
| 13 | 80 |
| 14 | 81 |
| 15 | 98 |
| 16 | 99 |
| 17 | 122 |
| 18 | 201 |
| 19 | 219 |
| 20 | 220 |
[1,19,20,21,22,39,40,41,59,60,61,79,80,81,98,99, 122,201,219,220] |