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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1104 |
| 2 | 219744 |
| 3 | 17231600 |
| 4 | 732408000 |
| 5 | 19795308432 |
| 6 | 375198613280 |
| 7 | 5332061194800 |
| 8 | 59655845622144 |
| 9 | 545344481522384 |
| 10 | 4193825568256992 |
| 11 | 27773245322423664 |
| 12 | 161436862710315584 |
| 13 | 836730066831879696 |
| 14 | 3918294356045306016 |
| 15 | 16763537436802169008 |
| 16 | 66145150360801272576 |
[1,1104,219744,17231600,732408000,19795308432, 375198613280,5332061194800,59655845622144, 545344481522384,4193825568256992, 27773245322423664,161436862710315584, 836730066831879696,3918294356045306016, 16763537436802169008,66145150360801272576] |