n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | -3 |
4 | 16 |
5 | -80 |
6 | 440 |
7 | -3171 |
8 | 24680 |
9 | -218952 |
10 | 2170018 |
11 | -23566675 |
12 | 279907076 |
13 | -3603250716 |
14 | 49968204078 |
15 | -742893013695 |
16 | 11785962447792 |
17 | -198748512229968 |
18 | 3550002639307890 |
19 | -66954457199954115 |
20 | 1329661510693923636 |
[1,0,2,-3,16,-80,440,-3171,24680,-218952,2170018, -23566675,279907076,-3603250716,49968204078, -742893013695,11785962447792,-198748512229968, 3550002639307890,-66954457199954115, 1329661510693923636] |