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A253386 as a simple table
| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 67 |
| 3 | 967 |
| 4 | 3967 |
| 5 | 93967 |
| 6 | 693967 |
| 7 | 7693967 |
| 8 | 87693967 |
| 9 | 687693967 |
| 10 | 1687693967 |
| 11 | 91687693967 |
| 12 | 991687693967 |
| 13 | 3991687693967 |
[7,67,967,3967,93967,693967,7693967,87693967, 687693967,1687693967,91687693967,991687693967, 3991687693967] |