n | a(n) |
---|---|
0 | -2 |
1 | 1 |
2 | -4 |
3 | 9 |
4 | -34 |
5 | 121 |
6 | -452 |
7 | 1681 |
8 | -6274 |
9 | 23409 |
10 | -87364 |
11 | 326041 |
12 | -1216802 |
13 | 4541161 |
14 | -16947844 |
15 | 63250209 |
16 | -236052994 |
17 | 880961761 |
18 | -3287794052 |
19 | 12270214441 |
20 | -45793063714 |
21 | 170902040409 |
22 | -637815097924 |
23 | 2380358351281 |
24 | -8883618307202 |
25 | 33154114877521 |
26 | -123732841202884 |
[-2,1,-4,9,-34,121,-452,1681,-6274,23409,-87364, 326041,-1216802,4541161,-16947844,63250209, -236052994,880961761,-3287794052,12270214441, -45793063714,170902040409,-637815097924, 2380358351281,-8883618307202,33154114877521, -123732841202884] |