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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 5 |
| 4 | 6 |
| 5 | 7 |
| 6 | 8 |
| 7 | 9 |
| 8 | 19 |
| 9 | 20 |
| 10 | 29 |
| 11 | 31 |
| 12 | 97 |
| 13 | 113 |
| 14 | 181 |
| 15 | 286 |
| 16 | 419 |
| 17 | 485 |
| 18 | 670 |
| 19 | 1216 |
[1,4,5,6,7,8,9,19,20,29,31,97,113,181,286,419,485, 670,1216] |