n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 0 |
4 | 8 |
5 | 24 |
6 | 0 |
7 | 216 |
8 | 4608 |
9 | 20736 |
10 | 0 |
11 | 1267200 |
12 | 30067200 |
13 | 194918400 |
14 | 0 |
15 | 27840153600 |
16 | 855119462400 |
17 | 7276643942400 |
18 | 0 |
19 | 1869882900480000 |
20 | 71740296069120000 |
21 | 754326563880960000 |
22 | 0 |
23 | 303064905515581440000 |
24 | 14020774294498836480000 |
25 | 175480402397791518720000 |
26 | 0 |
[1,0,0,8,24,0,216,4608,20736,0,1267200,30067200, 194918400,0,27840153600,855119462400, 7276643942400,0,1869882900480000, 71740296069120000,754326563880960000,0, 303064905515581440000,14020774294498836480000, 175480402397791518720000,0] |