n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 2 |
4 | -8 |
5 | -44 |
6 | 8 |
7 | 944 |
8 | 2304 |
9 | -27632 |
10 | -183776 |
11 | 975072 |
12 | 15141248 |
13 | -27882048 |
14 | -1461427328 |
15 | -1986004224 |
16 | 166452797440 |
17 | 850359527680 |
18 | -21941424508416 |
19 | -222801125934592 |
20 | 3231615038191616 |
21 | 57863671042155520 |
[0,1,2,2,-8,-44,8,944,2304,-27632,-183776,975072, 15141248,-27882048,-1461427328,-1986004224, 166452797440,850359527680,-21941424508416, -222801125934592,3231615038191616, 57863671042155520] |