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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 12 |
| 4 | 112 |
| 5 | 21 |
| 6 | 22 |
| 7 | 122 |
| 8 | 1122 |
| 9 | 11122 |
| 10 | 211 |
| 11 | 212 |
| 12 | 1212 |
| 13 | 221 |
| 14 | 222 |
| 15 | 1222 |
| 16 | 11222 |
| 17 | 111222 |
| 18 | 1111222 |
| 19 | 2111 |
| 20 | 2112 |
| 21 | 12112 |
| 22 | 2121 |
| 23 | 2122 |
| 24 | 12122 |
| 25 | 112122 |
| 26 | 2211 |
| 27 | 2212 |
| 28 | 12212 |
| 29 | 2221 |
| 30 | 2222 |
| 31 | 12222 |
| 32 | 112222 |
| 33 | 1112222 |
| 34 | 11112222 |
| 35 | 111112222 |
| 36 | 21111 |
| 37 | 21112 |
| 38 | 121112 |
| 39 | 21121 |
| 40 | 21122 |
[1,2,12,112,21,22,122,1122,11122,211,212,1212,221, 222,1222,11222,111222,1111222,2111,2112,12112, 2121,2122,12122,112122,2211,2212,12212,2221,2222, 12222,112222,1112222,11112222,111112222,21111, 21112,121112,21121,21122] |