n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 18 |
3 | 672 |
4 | 51600 |
5 | 6883920 |
6 | 1399989780 |
7 | 401060653056 |
8 | 153389081849472 |
9 | 75336980135472000 |
10 | 46137556536570417600 |
11 | 34425740593629308436480 |
12 | 30717476677184291740437120 |
13 | 32275806213061043955592058880 |
[0,4,18,672,51600,6883920,1399989780,401060653056, 153389081849472,75336980135472000, 46137556536570417600,34425740593629308436480, 30717476677184291740437120, 32275806213061043955592058880] |