n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 120 |
6 | 1080 |
7 | 8820 |
8 | 75600 |
9 | 701568 |
10 | 7091280 |
11 | 77961840 |
12 | 928778400 |
13 | 11937347136 |
14 | 164802429792 |
15 | 2433765035520 |
16 | 38299272560640 |
17 | 639999894048768 |
18 | 11320441140625920 |
19 | 211340086405770240 |
20 | 4153253573744179200 |
21 | 85710868976433254400 |
22 | 1853386172505676892160 |
[0,0,0,0,0,120,1080,8820,75600,701568,7091280, 77961840,928778400,11937347136,164802429792, 2433765035520,38299272560640,639999894048768, 11320441140625920,211340086405770240, 4153253573744179200,85710868976433254400, 1853386172505676892160] |