n | a(n) |
---|---|
2 | 1 |
3 | 1 |
4 | 18 |
5 | 66360 |
6 | 4147236820 |
7 | 19902009929142960 |
8 | 10325801406739620796634430 |
9 | 776107138571279347069904891019268480 |
10 | 10911068841557131648034491574230872615312437194176 |
[1,1,18,66360,4147236820,19902009929142960, 10325801406739620796634430, 776107138571279347069904891019268480, 10911068841557131648034491574230872615312437194176\ ] |