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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 8 |
| 3 | 91 |
| 4 | 944 |
| 5 | 10009 |
| 6 | 105560 |
| 7 | 1114723 |
| 8 | 11767904 |
| 9 | 124240753 |
| 10 | 1311659432 |
| 11 | 13847775787 |
| 12 | 146197010960 |
| 13 | 1543466033929 |
| 14 | 16295047567352 |
| 15 | 172033963454899 |
| 16 | 1816237991957696 |
| 17 | 19174820948943841 |
| 18 | 202436993374408520 |
| 19 | 2137216112616751867 |
[0,1,8,91,944,10009,105560,1114723,11767904, 124240753,1311659432,13847775787,146197010960, 1543466033929,16295047567352,172033963454899, 1816237991957696,19174820948943841, 202436993374408520,2137216112616751867] |