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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 11 |
| 4 | 12 |
| 5 | 111 |
| 6 | 212 |
| 7 | 1111 |
| 8 | 1212 |
| 9 | 11111 |
| 10 | 21212 |
| 11 | 111111 |
| 12 | 221212 |
| 13 | 1111111 |
| 14 | 1221212 |
| 15 | 11111111 |
| 16 | 11221212 |
| 17 | 111111111 |
| 18 | 211221212 |
| 19 | 1111111111 |
| 20 | 2211221212 |
[1,2,11,12,111,212,1111,1212,11111,21212,111111, 221212,1111111,1221212,11111111,11221212, 111111111,211221212,1111111111,2211221212] |