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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 75 |
| 2 | 272880 |
| 3 | 4681655040 |
| 4 | 221478589107480 |
| 5 | 22313622005672849712 |
| 6 | 4108665216956980742226192 |
| 7 | 1249503956658157724969373808320 |
| 8 | 583952821303314451291898006535866460 |
| 9 | 397372225886096887788939487944785734626120 |
| 10 | 377577476850495509525002042506806447493291890064 |
[1,75,272880,4681655040,221478589107480, 22313622005672849712,4108665216956980742226192, 1249503956658157724969373808320, 583952821303314451291898006535866460, 397372225886096887788939487944785734626120, 377577476850495509525002042506806447493291890064] |