n | a(n) |
---|---|
0 | -1 |
1 | 2 |
2 | -4 |
3 | 9 |
4 | -25 |
5 | 82 |
6 | -284 |
7 | 969 |
8 | -3185 |
9 | 10082 |
10 | -30964 |
11 | 93129 |
12 | -276745 |
13 | 818482 |
14 | -2421644 |
15 | 7188489 |
16 | -21428705 |
17 | 64121282 |
18 | -192388324 |
19 | 578087049 |
20 | -1737827065 |
21 | 5223134482 |
22 | -15690187004 |
23 | 47105428809 |
24 | -141351839825 |
25 | 424023394082 |
26 | -1271763913684 |
[-1,2,-4,9,-25,82,-284,969,-3185,10082,-30964, 93129,-276745,818482,-2421644,7188489,-21428705, 64121282,-192388324,578087049,-1737827065, 5223134482,-15690187004,47105428809,-141351839825, 424023394082,-1271763913684] |