n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | -3 |
4 | 16 |
5 | -50 |
6 | 560 |
7 | -4116 |
8 | 49376 |
9 | -495648 |
10 | 6643648 |
11 | -86408080 |
12 | 1355660480 |
13 | -21635261856 |
14 | 389870008320 |
15 | -7287717739680 |
16 | 148738206314496 |
17 | -3175392718618112 |
18 | 72630134425104384 |
19 | -1740244201350372864 |
20 | 44148745987324567552 |
21 | -1171621057231560284160 |
[0,0,2,-3,16,-50,560,-4116,49376,-495648,6643648, -86408080,1355660480,-21635261856,389870008320, -7287717739680,148738206314496,-3175392718618112, 72630134425104384,-1740244201350372864, 44148745987324567552,-1171621057231560284160] |