n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 6 |
4 | 720 |
5 | 6652800 |
6 | 1693749657600 |
7 | 367216146859161600000 |
8 | 1888288177044984240734208000000 |
9 | 4157567140515322460268246337585152000000000 |
[1,1,6,720,6652800,1693749657600, 367216146859161600000, 1888288177044984240734208000000, 4157567140515322460268246337585152000000000] |