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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 8 |
| 7 | 22 |
| 8 | 23 |
| 9 | 44 |
| 10 | 46 |
| 11 | 48 |
| 12 | 52 |
| 13 | 53 |
| 14 | 55 |
| 15 | 57 |
| 16 | 64 |
| 17 | 72 |
| 18 | 84 |
| 19 | 222 |
| 20 | 444 |
| 21 | 452 |
| 22 | 524 |
| 23 | 644 |
| 24 | 722 |
| 25 | 723 |
| 26 | 844 |
| 27 | 852 |
| 28 | 2222 |
| 29 | 2244 |
| 30 | 4442 |
| 31 | 5444 |
| 32 | 6422 |
| 33 | 7444 |
| 34 | 8422 |
| 35 | 22444 |
| 36 | 44222 |
| 37 | 52224 |
| 38 | 64444 |
[2,3,4,6,8,22,23,44,46,48,52,53,55,57,64,72,84, 222,444,452,524,644,722,723,844,852,2222,2244, 4442,5444,6422,7444,8422,22444,44222,52224,64444] |