n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | -4 |
4 | 16 |
5 | -80 |
6 | 432 |
7 | -2304 |
8 | 10944 |
9 | -35328 |
10 | -74112 |
11 | 2736384 |
12 | -30853632 |
13 | 238663680 |
14 | -1247457280 |
15 | 2201247744 |
16 | 32530722816 |
17 | -320650199040 |
18 | 156266184704 |
19 | 18314630348800 |
20 | -20667999748096 |
21 | -3428200020508672 |
[0,1,2,-4,16,-80,432,-2304,10944,-35328,-74112, 2736384,-30853632,238663680,-1247457280, 2201247744,32530722816,-320650199040,156266184704, 18314630348800,-20667999748096,-3428200020508672] |