n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | -1 |
3 | -2 |
4 | 4 |
5 | 0 |
6 | -1 |
7 | -16 |
8 | 64 |
9 | -256 |
10 | 1319 |
11 | -7680 |
12 | 49204 |
13 | -346112 |
14 | 2653559 |
15 | -22022144 |
16 | 196707424 |
17 | -1881735168 |
18 | 19194804719 |
19 | -207983607808 |
20 | 2385684870724 |
21 | -28880901505024 |
22 | 367985503366799 |
23 | -4922617151619072 |
24 | 68980888889771104 |
[0,1,-1,-2,4,0,-1,-16,64,-256,1319,-7680,49204, -346112,2653559,-22022144,196707424,-1881735168, 19194804719,-207983607808,2385684870724, -28880901505024,367985503366799,-4922617151619072, 68980888889771104] |