n | a(n) |
---|---|
1 | 2 |
2 | -6 |
3 | 24 |
4 | -80 |
5 | 450 |
6 | -2142 |
7 | 17696 |
8 | -112464 |
9 | 1232370 |
10 | -9761510 |
11 | 132951192 |
12 | -1258797696 |
13 | 20476388114 |
14 | -225380451870 |
15 | 4261074439680 |
16 | -53438049741152 |
17 | 1151146814425506 |
18 | -16199301256675974 |
19 | 391615698778725080 |
20 | -6109914386833902960 |
[2,-6,24,-80,450,-2142,17696,-112464,1232370, -9761510,132951192,-1258797696,20476388114, -225380451870,4261074439680,-53438049741152, 1151146814425506,-16199301256675974, 391615698778725080,-6109914386833902960] |