n | a(n) |
---|---|
0 | 2 |
1 | -1 |
2 | -1 |
3 | 1 |
4 | 3 |
5 | 1 |
6 | 3 |
7 | 9 |
8 | 19 |
9 | 33 |
10 | 67 |
11 | 137 |
12 | 275 |
13 | 545 |
14 | 1091 |
15 | 2185 |
16 | 4371 |
17 | 8737 |
18 | 17475 |
19 | 34953 |
20 | 69907 |
21 | 139809 |
22 | 279619 |
23 | 559241 |
24 | 1118483 |
25 | 2236961 |
26 | 4473923 |
27 | 8947849 |
28 | 17895699 |
29 | 35791393 |
30 | 71582787 |
31 | 143165577 |
32 | 286331155 |
33 | 572662305 |
34 | 1145324611 |
35 | 2290649225 |
36 | 4581298451 |
37 | 9162596897 |
[2,-1,-1,1,3,1,3,9,19,33,67,137,275,545,1091,2185, 4371,8737,17475,34953,69907,139809,279619,559241, 1118483,2236961,4473923,8947849,17895699,35791393, 71582787,143165577,286331155,572662305,1145324611, 2290649225,4581298451,9162596897] |