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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 8 |
| 4 | 9 |
| 5 | 13 |
| 6 | 14 |
| 7 | 22 |
| 8 | 33 |
| 9 | 44 |
| 10 | 52 |
| 11 | 72 |
| 12 | 77 |
| 13 | 87 |
| 14 | 92 |
| 15 | 222 |
| 16 | 322 |
| 17 | 622 |
| 18 | 7737 |
| 19 | 7878 |
| 20 | 30302 |
| 21 | 44449 |
| 22 | 72777 |
| 23 | 844844 |
| 24 | 44744744 |
[2,3,8,9,13,14,22,33,44,52,72,77,87,92,222,322, 622,7737,7878,30302,44449,72777,844844,44744744] |