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| n | a(n) |
|---|---|
| 2 | 7 |
| 3 | 777 |
| 4 | 8787 |
| 5 | 886845 |
| 6 | 7777777 |
| 7 | 878754321 |
| 8 | 8888787871 |
| 9 | 887885887811 |
| 10 | 8878878767816 |
| 11 | 878787878787878 |
| 12 | 8888888677748678 |
| 13 | 888888887867751312 |
| 14 | 8787878787873543211 |
| 15 | 888878888387777136788 |
| 16 | 8888888888486868617568 |
[7,777,8787,886845,7777777,878754321,8888787871, 887885887811,8878878767816,878787878787878, 8888888677748678,888888887867751312, 8787878787873543211,888878888387777136788, 8888888888486868617568] |