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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 222 |
| 3 | 21222 |
| 4 | 1221222 |
| 5 | 222112 |
| 6 | 21221222 |
| 7 | 2221221222 |
| 8 | 212221221222 |
| 9 | 12212221221222 |
| 10 | 2212212222112 |
| 11 | 122221121221222 |
| 12 | 11212212222112 |
| 13 | 2122221122112 |
| 14 | 211221121221222 |
| 15 | 11212212221221222 |
| 16 | 2122212212222112 |
| 17 | 122122221121221222 |
| 18 | 22211212212222112 |
| 19 | 2122122221121221222 |
| 20 | 222211212212221221222 |
[2,222,21222,1221222,222112,21221222,2221221222, 212221221222,12212221221222,2212212222112, 122221121221222,11212212222112,2122221122112, 211221121221222,11212212221221222, 2122212212222112,122122221121221222, 22211212212222112,2122122221121221222, 222211212212221221222] |