n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | -1 |
3 | 4 |
4 | -14 |
5 | 80 |
6 | -496 |
7 | 3904 |
8 | -34544 |
9 | 354560 |
10 | -4055296 |
11 | 51733504 |
12 | -724212224 |
13 | 11070525440 |
14 | -183218384896 |
15 | 3266330312704 |
16 | -62380415842304 |
17 | 1270842139934720 |
18 | -27507260369207296 |
19 | 630424777638805504 |
20 | -15250924309151350784 |
21 | 388362339077351014400 |
22 | -10384039093607251050496 |
[0,1,-1,4,-14,80,-496,3904,-34544,354560,-4055296, 51733504,-724212224,11070525440,-183218384896, 3266330312704,-62380415842304,1270842139934720, -27507260369207296,630424777638805504, -15250924309151350784,388362339077351014400, -10384039093607251050496] |