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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 8 |
| 3 | 81 |
| 4 | 800 |
| 5 | 7921 |
| 6 | 78408 |
| 7 | 776161 |
| 8 | 7683200 |
| 9 | 76055841 |
| 10 | 752875208 |
| 11 | 7452696241 |
| 12 | 73774087200 |
| 13 | 730288175761 |
| 14 | 7229107670408 |
| 15 | 71560788528321 |
| 16 | 708378777612800 |
| 17 | 7012226987599681 |
| 18 | 69413891098384008 |
| 19 | 687126683996240401 |
[0,1,8,81,800,7921,78408,776161,7683200,76055841, 752875208,7452696241,73774087200,730288175761, 7229107670408,71560788528321,708378777612800, 7012226987599681,69413891098384008, 687126683996240401] |