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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 36 |
| 3 | 3969 |
| 4 | 69696 |
| 5 | 93636 |
| 6 | 3663396 |
| 7 | 9696996 |
| 8 | 966339396 |
| 9 | 6693366969 |
| 10 | 36333696996 |
| 11 | 63396693369 |
| 12 | 96693633936 |
| 13 | 33993333636639339663936 |
| 14 | 399339393339639693369636 |
| 15 | 9936969933633699966996996 |
| 16 | 396693636699939696999339663969 |
| 17 | 6636966336636339969666396999936 |
| 18 | 339666666363999366939366969366969936633336969 |
[9,36,3969,69696,93636,3663396,9696996,966339396, 6693366969,36333696996,63396693369,96693633936, 33993333636639339663936,399339393339639693369636, 9936969933633699966996996, 396693636699939696999339663969, 6636966336636339969666396999936, 339666666363999366939366969366969936633336969] |