n | a(n) |
---|---|
1 | 1 |
2 | -1 |
3 | 1 |
4 | -2 |
5 | 3 |
6 | -4 |
7 | 6 |
8 | -10 |
9 | 18 |
10 | -35 |
11 | 71 |
12 | -147 |
13 | 303 |
14 | -616 |
15 | 1244 |
16 | -2508 |
17 | 5067 |
18 | -10296 |
19 | 21097 |
20 | -43624 |
21 | 90929 |
22 | -190629 |
23 | 401053 |
24 | -845374 |
25 | 1784015 |
26 | -3768964 |
27 | 7973941 |
28 | -16902610 |
29 | 35909941 |
30 | -76473042 |
31 | 163227753 |
32 | -349117291 |
33 | 748032779 |
34 | -1605215441 |
35 | 3449280634 |
36 | -7420879949 |
37 | 15984045722 |
[1,-1,1,-2,3,-4,6,-10,18,-35,71,-147,303,-616, 1244,-2508,5067,-10296,21097,-43624,90929,-190629, 401053,-845374,1784015,-3768964,7973941,-16902610, 35909941,-76473042,163227753,-349117291,748032779, -1605215441,3449280634,-7420879949,15984045722] |