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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 212 |
| 2 | 22122 |
| 3 | 2221222 |
| 4 | 222212222 |
| 5 | 22222122222 |
| 6 | 2222221222222 |
| 7 | 222222212222222 |
| 8 | 22222222122222222 |
| 9 | 2222222221222222222 |
| 10 | 222222222212222222222 |
| 11 | 22222222222122222222222 |
| 12 | 2222222222221222222222222 |
| 13 | 222222222222212222222222222 |
| 14 | 22222222222222122222222222222 |
| 15 | 2222222222222221222222222222222 |
[1,212,22122,2221222,222212222,22222122222, 2222221222222,222222212222222,22222222122222222, 2222222221222222222,222222222212222222222, 22222222222122222222222,2222222222221222222222222, 222222222222212222222222222, 22222222222222122222222222222, 2222222222222221222222222222222] |