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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 89 |
| 3 | 983 |
| 4 | 9941 |
| 5 | 99929 |
| 6 | 999931 |
| 7 | 9999929 |
| 8 | 99999827 |
| 9 | 999999739 |
| 10 | 9999999769 |
| 11 | 99999999763 |
| 12 | 999999999697 |
| 13 | 9999999999443 |
| 14 | 99999999999503 |
| 15 | 999999999999353 |
| 16 | 9999999999999431 |
| 17 | 99999999999999251 |
| 18 | 999999999999999463 |
| 19 | 9999999999999999343 |
| 20 | 99999999999999999199 |
[7,89,983,9941,99929,999931,9999929,99999827, 999999739,9999999769,99999999763,999999999697, 9999999999443,99999999999503,999999999999353, 9999999999999431,99999999999999251, 999999999999999463,9999999999999999343, 99999999999999999199] |