n | a(n) |
---|---|
2 | 1 |
3 | 3 |
4 | -1 |
5 | 0 |
6 | 4 |
7 | -28 |
8 | 188 |
9 | -1368 |
10 | 11016 |
11 | -98208 |
12 | 964512 |
13 | -10370880 |
14 | 121337280 |
15 | -1535880960 |
16 | 20924455680 |
17 | -305396421120 |
18 | 4755302899200 |
19 | -78700195123200 |
20 | 1379748896870400 |
21 | -25546854999859200 |
22 | 498194992408780800 |
23 | -10207190048993280000 |
24 | 219216795045212160000 |
[1,3,-1,0,4,-28,188,-1368,11016,-98208,964512, -10370880,121337280,-1535880960,20924455680, -305396421120,4755302899200,-78700195123200, 1379748896870400,-25546854999859200, 498194992408780800,-10207190048993280000, 219216795045212160000] |