n | a(n) |
---|---|
1 | 1 |
2 | -2 |
3 | 2 |
4 | -1 |
5 | -2 |
6 | 10 |
7 | -30 |
8 | 76 |
9 | -173 |
10 | 363 |
11 | -717 |
12 | 1363 |
13 | -2551 |
14 | 4797 |
15 | -9189 |
16 | 18015 |
17 | -36008 |
18 | 72725 |
19 | -146930 |
20 | 294423 |
21 | -581758 |
22 | 1130231 |
23 | -2158552 |
24 | 4061201 |
25 | -7557522 |
26 | 13983585 |
27 | -25872679 |
28 | 48115364 |
29 | -90273986 |
30 | 171186911 |
[1,-2,2,-1,-2,10,-30,76,-173,363,-717,1363,-2551, 4797,-9189,18015,-36008,72725,-146930,294423, -581758,1130231,-2158552,4061201,-7557522, 13983585,-25872679,48115364,-90273986,171186911] |