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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 66 |
| 3 | 488 |
| 4 | 666 |
| 5 | 848 |
| 6 | 884 |
| 7 | 3999 |
| 8 | 4688 |
| 9 | 4868 |
| 10 | 4886 |
| 11 | 6488 |
| 12 | 6666 |
| 13 | 6848 |
| 14 | 6884 |
| 15 | 8468 |
| 16 | 8486 |
| 17 | 8648 |
| 18 | 8684 |
| 19 | 8846 |
| 20 | 8864 |
| 21 | 9399 |
| 22 | 9939 |
| 23 | 9993 |
| 24 | 36999 |
| 25 | 38888 |
| 26 | 39699 |
| 27 | 39969 |
| 28 | 39996 |
| 29 | 44999 |
| 30 | 46688 |
| 31 | 46868 |
| 32 | 46886 |
| 33 | 48668 |
| 34 | 48686 |
| 35 | 48866 |
| 36 | 49499 |
| 37 | 49949 |
| 38 | 49994 |
| 39 | 63999 |
[6,66,488,666,848,884,3999,4688,4868,4886,6488, 6666,6848,6884,8468,8486,8648,8684,8846,8864,9399, 9939,9993,36999,38888,39699,39969,39996,44999, 46688,46868,46886,48668,48686,48866,49499,49949, 49994,63999] |