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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 12 |
| 3 | 122 |
| 4 | 123 |
| 5 | 1222 |
| 6 | 1223 |
| 7 | 1232 |
| 8 | 1233 |
| 9 | 1234 |
| 10 | 12222 |
| 11 | 12223 |
| 12 | 12232 |
| 13 | 12233 |
| 14 | 12234 |
| 15 | 12322 |
| 16 | 12323 |
| 17 | 12324 |
| 18 | 12332 |
| 19 | 12333 |
| 20 | 12334 |
| 21 | 12342 |
| 22 | 12343 |
| 23 | 12344 |
| 24 | 12345 |
| 25 | 122222 |
| 26 | 122223 |
| 27 | 122232 |
| 28 | 122233 |
| 29 | 122234 |
| 30 | 122322 |
| 31 | 122323 |
| 32 | 122324 |
| 33 | 122332 |
| 34 | 122333 |
| 35 | 122334 |
| 36 | 122342 |
| 37 | 122343 |
| 38 | 122344 |
[1,12,122,123,1222,1223,1232,1233,1234,12222, 12223,12232,12233,12234,12322,12323,12324,12332, 12333,12334,12342,12343,12344,12345,122222,122223, 122232,122233,122234,122322,122323,122324,122332, 122333,122334,122342,122343,122344] |