n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -2 |
3 | -3 |
4 | 8 |
5 | 40 |
6 | -20 |
7 | -651 |
8 | -1160 |
9 | 10872 |
10 | 53102 |
11 | -213235 |
12 | -2765684 |
13 | -4784988 |
14 | 42740178 |
15 | -433914495 |
16 | -15184673712 |
17 | -207885336400 |
18 | -2790244125426 |
19 | -48660847539651 |
20 | -950341379177012 |
21 | -18783035394110820 |
[1,0,-2,-3,8,40,-20,-651,-1160,10872,53102, -213235,-2765684,-4784988,42740178,-433914495, -15184673712,-207885336400,-2790244125426, -48660847539651,-950341379177012, -18783035394110820] |