n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -1 |
3 | 0 |
4 | -1 |
5 | 2 |
6 | 0 |
7 | -1 |
8 | 2 |
9 | -6 |
10 | 0 |
11 | -1 |
12 | 4 |
13 | -6 |
14 | 24 |
15 | 0 |
16 | -1 |
17 | 4 |
18 | -12 |
19 | 24 |
20 | -120 |
21 | 0 |
22 | -1 |
23 | 6 |
24 | -18 |
25 | 48 |
26 | -120 |
27 | 720 |
28 | 0 |
29 | -1 |
30 | 6 |
31 | -24 |
32 | 72 |
33 | -240 |
34 | 720 |
35 | -5040 |
36 | 0 |
37 | -1 |
38 | 8 |
39 | -30 |
40 | 120 |
41 | -360 |
42 | 1440 |
43 | -5040 |
44 | 40320 |
45 | 0 |
46 | -1 |
47 | 8 |
48 | -42 |
49 | 144 |
50 | -600 |
51 | 2160 |
52 | -10080 |
53 | 40320 |
54 | -362880 |
[1,0,-1,0,-1,2,0,-1,2,-6,0,-1,4,-6,24,0,-1,4,-12, 24,-120,0,-1,6,-18,48,-120,720,0,-1,6,-24,72,-240, 720,-5040,0,-1,8,-30,120,-360,1440,-5040,40320,0, -1,8,-42,144,-600,2160,-10080,40320,-362880] |