n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -6 |
3 | 0 |
4 | 90 |
5 | 0 |
6 | -1680 |
7 | 0 |
8 | 34650 |
9 | 0 |
10 | -756756 |
11 | 0 |
12 | 17153136 |
13 | 0 |
14 | -399072960 |
15 | 0 |
16 | 9465511770 |
17 | 0 |
18 | -227873431500 |
19 | 0 |
20 | 5550996791340 |
21 | 0 |
22 | -136526995463040 |
23 | 0 |
24 | 3384731762521200 |
25 | 0 |
26 | -84478098072866400 |
27 | 0 |
28 | 2120572665910728000 |
29 | 0 |
30 | -53494979785374631680 |
31 | 0 |
[1,0,-6,0,90,0,-1680,0,34650,0,-756756,0,17153136, 0,-399072960,0,9465511770,0,-227873431500,0, 5550996791340,0,-136526995463040,0, 3384731762521200,0,-84478098072866400,0, 2120572665910728000,0,-53494979785374631680,0] |