n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 1081600 |
3 | 528465082730906880000 |
4 | 29276520893554373473343522853366005760000000000 |
5 | 5719545329208791496596894540018824083491259163047733746620041978183680000000000000000 |
[1,2,1081600,528465082730906880000, 29276520893554373473343522853366005760000000000, 57195453292087914965968945400188240834912591630477\ 33746620041978183680000000000000000] |