n | a(n) |
---|---|
1 | 0 |
2 | -1 |
3 | 4 |
4 | -12 |
5 | -64 |
6 | -208 |
7 | 1088 |
8 | -960 |
9 | -8192 |
10 | -6400 |
11 | 58368 |
12 | -27648 |
13 | -344064 |
14 | -151552 |
15 | 1982464 |
16 | -638976 |
17 | -10485760 |
18 | -3211264 |
19 | 54788096 |
20 | -13369344 |
21 | -272629760 |
22 | -63963136 |
23 | 1346371584 |
24 | -264241152 |
25 | -6442450944 |
26 | -1224736768 |
27 | 30668750848 |
[0,-1,4,-12,-64,-208,1088,-960,-8192,-6400,58368, -27648,-344064,-151552,1982464,-638976,-10485760, -3211264,54788096,-13369344,-272629760,-63963136, 1346371584,-264241152,-6442450944,-1224736768, 30668750848] |