n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 5040 |
9 | 408240 |
10 | 22680000 |
11 | 1105196400 |
12 | 51492672000 |
13 | 2386304640720 |
14 | 112267476921600 |
15 | 5422473658602000 |
16 | 270574193944454400 |
17 | 13996921541118516000 |
18 | 752006571801610245120 |
19 | 41994571006059763946400 |
20 | 2437848824911611890688000 |
[0,0,0,0,0,0,0,0,5040,408240,22680000,1105196400, 51492672000,2386304640720,112267476921600, 5422473658602000,270574193944454400, 13996921541118516000,752006571801610245120, 41994571006059763946400,2437848824911611890688000] |