n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 0 |
3 | 6 |
4 | 24 |
5 | 480 |
6 | 5760 |
7 | 126000 |
8 | 2580480 |
9 | 69310080 |
10 | 1959552000 |
11 | 64505548800 |
12 | 2292022656000 |
13 | 90366525849600 |
14 | 3843167789260800 |
15 | 177248722210560000 |
16 | 8758468152225792000 |
17 | 463225965106544640000 |
18 | 26058454876652470272000 |
[0,1,0,6,24,480,5760,126000,2580480,69310080, 1959552000,64505548800,2292022656000, 90366525849600,3843167789260800, 177248722210560000,8758468152225792000, 463225965106544640000,26058454876652470272000] |