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| n | a(n) |
|---|---|
| 1 | 2222 |
| 2 | 12222 |
| 3 | 20222 |
| 4 | 21222 |
| 5 | 22022 |
| 6 | 22122 |
| 7 | 22202 |
| 8 | 22212 |
| 9 | 22220 |
| 10 | 22221 |
| 11 | 22223 |
| 12 | 22224 |
| 13 | 22225 |
| 14 | 22226 |
| 15 | 22227 |
| 16 | 22228 |
| 17 | 22229 |
| 18 | 22232 |
| 19 | 22242 |
| 20 | 22252 |
| 21 | 22262 |
| 22 | 22272 |
| 23 | 22282 |
| 24 | 22292 |
| 25 | 22322 |
| 26 | 22422 |
| 27 | 22522 |
| 28 | 22622 |
| 29 | 22722 |
| 30 | 22822 |
| 31 | 22922 |
[2222,12222,20222,21222,22022,22122,22202,22212, 22220,22221,22223,22224,22225,22226,22227,22228, 22229,22232,22242,22252,22262,22272,22282,22292, 22322,22422,22522,22622,22722,22822,22922] |