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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 89 |
| 4 | 89 |
| 5 | 589 |
| 6 | 3089 |
| 7 | 3089 |
| 8 | 3089 |
| 9 | 315589 |
| 10 | 315589 |
| 11 | 8128089 |
| 12 | 164378089 |
| 13 | 945628089 |
| 14 | 1922190589 |
| 15 | 11687815589 |
| 16 | 109344065589 |
| 17 | 231414378089 |
| 18 | 1452117503089 |
| 19 | 4503875315589 |
| 20 | 65539031565589 |
| 21 | 141832976878089 |
| 22 | 1667711883128089 |
[1,9,89,89,589,3089,3089,3089,315589,315589, 8128089,164378089,945628089,1922190589, 11687815589,109344065589,231414378089, 1452117503089,4503875315589,65539031565589, 141832976878089,1667711883128089] |