n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | -2 |
3 | 0 |
4 | -8 |
5 | 40 |
6 | -384 |
7 | 4144 |
8 | -54144 |
9 | 815616 |
10 | -13958400 |
11 | 267218688 |
12 | -5657444352 |
13 | 131222866944 |
14 | -3308765300736 |
15 | 90105807790080 |
16 | -2635416865112064 |
17 | 82388152861360128 |
18 | -2741414412289572864 |
19 | 96732603325960224768 |
20 | -3607731031922910167040 |
[0,1,-2,0,-8,40,-384,4144,-54144,815616,-13958400, 267218688,-5657444352,131222866944,-3308765300736, 90105807790080,-2635416865112064, 82388152861360128,-2741414412289572864, 96732603325960224768,-3607731031922910167040] |