n | a(n) |
---|---|
1 | 1 |
2 | -2 |
3 | -2 |
4 | -8 |
5 | -44 |
6 | -296 |
7 | -2312 |
8 | -20384 |
9 | -199376 |
10 | -2138336 |
11 | -24936416 |
12 | -314142848 |
13 | -4252773824 |
14 | -61594847360 |
15 | -950757812864 |
16 | -15586971531776 |
17 | -270569513970944 |
18 | -4959071121374720 |
19 | -95721139472072192 |
20 | -1941212789888952320 |
21 | -41271304403571227648 |
[1,-2,-2,-8,-44,-296,-2312,-20384,-199376, -2138336,-24936416,-314142848,-4252773824, -61594847360,-950757812864,-15586971531776, -270569513970944,-4959071121374720, -95721139472072192,-1941212789888952320, -41271304403571227648] |