n | a(n) |
---|---|
1 | 1 |
2 | -4 |
3 | 16 |
4 | -64 |
5 | 252 |
6 | -980 |
7 | 3752 |
8 | -14076 |
9 | 51384 |
10 | -180488 |
11 | 597812 |
12 | -1788936 |
13 | 4284828 |
14 | -3665376 |
15 | -47694524 |
16 | 475585724 |
17 | -3186717720 |
18 | 18465627936 |
19 | -98993741736 |
20 | 504886869432 |
21 | -2484393916472 |
22 | 11887606679816 |
23 | -55566604265244 |
24 | 254411449305096 |
25 | -1142492183274444 |
26 | 5033985939170544 |
[1,-4,16,-64,252,-980,3752,-14076,51384,-180488, 597812,-1788936,4284828,-3665376,-47694524, 475585724,-3186717720,18465627936,-98993741736, 504886869432,-2484393916472,11887606679816, -55566604265244,254411449305096,-1142492183274444, 5033985939170544] |