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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 121 |
| 3 | 121021 |
| 4 | 1210111021 |
| 5 | 12101112111021 |
| 6 | 121011122012111021 |
| 7 | 1210111220212012111021 |
| 8 | 12101112202122212012111021 |
| 9 | 1210111220212210022212012111021 |
| 10 | 1210111220212210010110022212012111021 |
| 11 | 1210111220212210010110210110022212012111021 |
| 12 | 1210111220212210010110211010210110022212012111021 |
[1,121,121021,1210111021,12101112111021, 121011122012111021,1210111220212012111021, 12101112202122212012111021, 1210111220212210022212012111021, 1210111220212210010110022212012111021, 1210111220212210010110210110022212012111021, 1210111220212210010110211010210110022212012111021] |