n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 120 |
7 | 840 |
8 | 6720 |
9 | 60480 |
10 | 604800 |
11 | 6652800 |
12 | 73180800 |
13 | 951350400 |
14 | 13318905600 |
15 | 199783584000 |
16 | 3196537344000 |
17 | 54341134848000 |
18 | 983080530432000 |
19 | 18678530078208000 |
20 | 373570601564160000 |
21 | 7844982632847360000 |
22 | 172589617922641920000 |
23 | 3969561212220764160000 |
[0,0,0,0,0,0,120,840,6720,60480,604800,6652800, 73180800,951350400,13318905600,199783584000, 3196537344000,54341134848000,983080530432000, 18678530078208000,373570601564160000, 7844982632847360000,172589617922641920000, 3969561212220764160000] |