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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 21 |
| 3 | 212 |
| 4 | 2122 |
| 5 | 21221 |
| 6 | 212211 |
| 7 | 2122111 |
| 8 | 21221112 |
| 9 | 212211122 |
| 10 | 2122111221 |
| 11 | 21221112212 |
| 12 | 212211122121 |
| 13 | 2122111221211 |
| 14 | 21221112212112 |
| 15 | 212211122121122 |
| 16 | 2122111221211221 |
| 17 | 21221112212112212 |
| 18 | 212211122121122121 |
| 19 | 2122111221211221212 |
| 20 | 21221112212112212121 |
| 21 | 212211122121122121211 |
| 22 | 2122111221211221212112 |
[2,21,212,2122,21221,212211,2122111,21221112, 212211122,2122111221,21221112212,212211122121, 2122111221211,21221112212112,212211122121122, 2122111221211221,21221112212112212, 212211122121122121,2122111221211221212, 21221112212112212121,212211122121122121211, 2122111221211221212112] |