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| n | a(n) |
|---|---|
| 0 | 9 |
| 1 | 69 |
| 2 | 489 |
| 3 | 3429 |
| 4 | 24009 |
| 5 | 168069 |
| 6 | 1176489 |
| 7 | 8235429 |
| 8 | 57648009 |
| 9 | 403536069 |
| 10 | 2824752489 |
| 11 | 19773267429 |
| 12 | 138412872009 |
| 13 | 968890104069 |
| 14 | 6782230728489 |
| 15 | 47475615099429 |
| 16 | 332329305696009 |
| 17 | 2326305139872069 |
| 18 | 16284135979104489 |
| 19 | 113988951853731429 |
[9,69,489,3429,24009,168069,1176489,8235429, 57648009,403536069,2824752489,19773267429, 138412872009,968890104069,6782230728489, 47475615099429,332329305696009,2326305139872069, 16284135979104489,113988951853731429] |