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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 90 |
| 3 | 810 |
| 4 | 7210 |
| 5 | 64170 |
| 6 | 568970 |
| 7 | 5044810 |
| 8 | 44649930 |
| 9 | 395180650 |
| 10 | 3494051130 |
| 11 | 30893156970 |
| 12 | 272971707930 |
| 13 | 2411975074570 |
| 14 | 21302972395370 |
| 15 | 188151452434090 |
| 16 | 1661273238131050 |
| 17 | 14668124524584170 |
| 18 | 129481802727508250 |
| 19 | 1142991284620073450 |
| 20 | 10087904498275867530 |
[1,10,90,810,7210,64170,568970,5044810,44649930, 395180650,3494051130,30893156970,272971707930, 2411975074570,21302972395370,188151452434090, 1661273238131050,14668124524584170, 129481802727508250,1142991284620073450, 10087904498275867530] |