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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 9 |
| 2 | 90 |
| 3 | 819 |
| 4 | 7380 |
| 5 | 66429 |
| 6 | 597870 |
| 7 | 5380839 |
| 8 | 48427560 |
| 9 | 435848049 |
| 10 | 3922632450 |
| 11 | 35303692059 |
| 12 | 317733228540 |
| 13 | 2859599056869 |
| 14 | 25736391511830 |
| 15 | 231627523606479 |
| 16 | 2084647712458320 |
| 17 | 18761829412124889 |
| 18 | 168856464709124010 |
| 19 | 1519708182382116099 |
| 20 | 13677373641439044900 |
[0,9,90,819,7380,66429,597870,5380839,48427560, 435848049,3922632450,35303692059,317733228540, 2859599056869,25736391511830,231627523606479, 2084647712458320,18761829412124889, 168856464709124010,1519708182382116099, 13677373641439044900] |