n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | -1 |
3 | 20 |
4 | -10 |
5 | 1 |
6 | 120 |
7 | -90 |
8 | 18 |
9 | -1 |
10 | 840 |
11 | -840 |
12 | 252 |
13 | -28 |
14 | 1 |
15 | 6720 |
16 | -8400 |
17 | 3360 |
18 | -560 |
19 | 40 |
20 | -1 |
21 | 60480 |
22 | -90720 |
23 | 45360 |
24 | -10080 |
25 | 1080 |
26 | -54 |
27 | 1 |
28 | 604800 |
29 | -1058400 |
30 | 635040 |
31 | -176400 |
32 | 25200 |
33 | -1890 |
34 | 70 |
35 | -1 |
36 | 6652800 |
37 | -13305600 |
38 | 9313920 |
[1,4,-1,20,-10,1,120,-90,18,-1,840,-840,252,-28,1, 6720,-8400,3360,-560,40,-1,60480,-90720,45360, -10080,1080,-54,1,604800,-1058400,635040,-176400, 25200,-1890,70,-1,6652800,-13305600,9313920] |