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| n | a(n) |
|---|---|
| 1 | 78 |
| 2 | 117 |
| 3 | 156 |
| 4 | 288 |
| 5 | 11127 |
| 6 | 11667 |
| 7 | 23388 |
| 8 | 27888 |
| 9 | 111177 |
| 10 | 228888 |
| 11 | 111111777 |
| 12 | 222888888 |
| 13 | 1111122267 |
| 14 | 3333337788 |
| 15 | 111111117777 |
| 16 | 222288888888 |
| 17 | 111111111177777 |
| 18 | 222228888888888 |
| 19 | 111111111111777777 |
| 20 | 222222888888888888 |
[78,117,156,288,11127,11667,23388,27888,111177, 228888,111111777,222888888,1111122267,3333337788, 111111117777,222288888888,111111111177777, 222228888888888,111111111111777777, 222222888888888888] |