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| n | a(n) |
|---|---|
| 1 | 68 |
| 2 | 168 |
| 3 | 268 |
| 4 | 368 |
| 5 | 468 |
| 6 | 568 |
| 7 | 668 |
| 8 | 689 |
| 9 | 768 |
| 10 | 868 |
| 11 | 968 |
| 12 | 1068 |
| 13 | 1168 |
| 14 | 1268 |
| 15 | 1368 |
| 16 | 1468 |
| 17 | 1568 |
| 18 | 1668 |
| 19 | 1689 |
| 20 | 1768 |
| 21 | 1868 |
| 22 | 1968 |
| 23 | 2068 |
| 24 | 2168 |
| 25 | 2268 |
| 26 | 2368 |
| 27 | 2468 |
| 28 | 2568 |
| 29 | 2668 |
| 30 | 2689 |
| 31 | 2768 |
| 32 | 2868 |
| 33 | 2968 |
| 34 | 3068 |
| 35 | 3168 |
| 36 | 3268 |
| 37 | 3368 |
| 38 | 3468 |
| 39 | 3568 |
[68,168,268,368,468,568,668,689,768,868,968,1068, 1168,1268,1368,1468,1568,1668,1689,1768,1868,1968, 2068,2168,2268,2368,2468,2568,2668,2689,2768,2868, 2968,3068,3168,3268,3368,3468,3568] |