n | a(n) |
---|---|
0 | 0 |
1 | 60 |
2 | 19958400 |
3 | 622452999168000 |
4 | 258520167388849766400000 |
5 | 675289572271869736778268672000000 |
6 | 7393367369949286697176489031997849600000000 |
[0,60,19958400,622452999168000, 258520167388849766400000, 675289572271869736778268672000000, 7393367369949286697176489031997849600000000] |