n | a(n) |
---|---|
0 | -1 |
1 | 1 |
2 | -1 |
3 | 3 |
4 | -6 |
5 | 18 |
6 | -45 |
7 | 136 |
8 | -378 |
9 | 1156 |
10 | -3405 |
11 | 10549 |
12 | -32175 |
13 | 100915 |
14 | -314834 |
15 | 998323 |
16 | -3163683 |
17 | 10127020 |
18 | -32462265 |
19 | 104751043 |
20 | -338742887 |
21 | 1100559573 |
22 | -3583933846 |
23 | 11711868458 |
24 | -38358103030 |
25 | 125974533997 |
26 | -414566089320 |
27 | 1367353737806 |
28 | -4518185596293 |
[-1,1,-1,3,-6,18,-45,136,-378,1156,-3405,10549, -32175,100915,-314834,998323,-3163683,10127020, -32462265,104751043,-338742887,1100559573, -3583933846,11711868458,-38358103030,125974533997, -414566089320,1367353737806,-4518185596293] |