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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 75 |
| 3 | 79380 |
| 4 | 1310904000 |
| 5 | 344319762124800 |
| 6 | 1444887697908695040000 |
| 7 | 96976611786040182520676352000 |
| 8 | 104131021972308383324202529613414400000 |
| 9 | 1788970984376098024967914354100894418012733440000 |
[1,75,79380,1310904000,344319762124800, 1444887697908695040000, 96976611786040182520676352000, 104131021972308383324202529613414400000, 1788970984376098024967914354100894418012733440000] |