n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | -3 |
4 | -56 |
5 | 720 |
6 | 360 |
7 | -175770 |
8 | 2811520 |
9 | 27714960 |
10 | -2332820800 |
11 | 36227931300 |
12 | 1242856742400 |
13 | -79410400212000 |
14 | 881326533651200 |
15 | 97641790837227000 |
16 | -5371510570250240000 |
17 | 7482518858066928000 |
18 | 12885336165384393984000 |
[0,0,2,-3,-56,720,360,-175770,2811520,27714960, -2332820800,36227931300,1242856742400, -79410400212000,881326533651200,97641790837227000, -5371510570250240000,7482518858066928000, 12885336165384393984000] |