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| n | a(n) |
|---|---|
| 1 | 504 |
| 2 | 1056706560 |
| 3 | 9077005607176765440 |
| 4 | 319368723699461283992462111539200 |
| 5 | 46025883638628966977843321053405598530493271244800 |
| 6 | 27168886279544618607869530961362524544707830196725394137207827070976000 |
[504,1056706560,9077005607176765440, 319368723699461283992462111539200, 46025883638628966977843321053405598530493271244800\ , 27168886279544618607869530961362524544707830196725\ 394137207827070976000] |