n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 16 |
4 | 1152 |
5 | 16640 |
6 | 140800 |
7 | 887040 |
8 | 4616192 |
9 | 20987904 |
10 | 86261760 |
11 | 327782400 |
12 | 1169653760 |
13 | 3964207104 |
14 | 12869828608 |
15 | 40285306880 |
16 | 122211532800 |
17 | 360794030080 |
18 | 1040028008448 |
19 | 2935426646016 |
20 | 8130951905280 |
21 | 22146344550400 |
22 | 59411980615680 |
23 | 157208570494976 |
[0,0,16,1152,16640,140800,887040,4616192,20987904, 86261760,327782400,1169653760,3964207104, 12869828608,40285306880,122211532800,360794030080, 1040028008448,2935426646016,8130951905280, 22146344550400,59411980615680,157208570494976] |