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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 21 |
| 4 | 320 |
| 5 | 2219 |
| 6 | 32218 |
| 7 | 332217 |
| 8 | 3332216 |
| 9 | 33332215 |
| 10 | 333332214 |
| 11 | 3333332213 |
[1,10,21,320,2219,32218,332217,3332216,33332215, 333332214,3333332213] |