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| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 100 |
| 3 | 450 |
| 4 | 2205 |
| 5 | 11970 |
| 6 | 66946 |
| 7 | 383845 |
| 8 | 2221688 |
| 9 | 12947130 |
| 10 | 75691595 |
| 11 | 443447550 |
| 12 | 2600917830 |
| 13 | 15265923595 |
| 14 | 89639239300 |
| 15 | 526483671750 |
| 16 | 3092701866155 |
| 17 | 18169057652502 |
| 18 | 106746028836790 |
| 19 | 627171773700111 |
| 20 | 3684942718387344 |
[10,100,450,2205,11970,66946,383845,2221688, 12947130,75691595,443447550,2600917830, 15265923595,89639239300,526483671750, 3092701866155,18169057652502,106746028836790, 627171773700111,3684942718387344] |