n | a(n) |
---|---|
0 | -1 |
1 | 3 |
2 | -1 |
3 | 2 |
4 | -1 |
5 | 5 |
6 | 6 |
7 | 17 |
8 | 27 |
9 | 58 |
10 | 111 |
11 | 229 |
12 | 454 |
13 | 913 |
14 | 1819 |
15 | 3642 |
16 | 7279 |
17 | 14565 |
18 | 29126 |
19 | 58257 |
20 | 116507 |
21 | 233018 |
22 | 466031 |
23 | 932069 |
24 | 1864134 |
25 | 3728273 |
26 | 7456539 |
27 | 14913082 |
28 | 29826159 |
29 | 59652325 |
30 | 119304646 |
31 | 238609297 |
32 | 477218587 |
33 | 954437178 |
34 | 1908874351 |
35 | 3817748709 |
36 | 7635497414 |
[-1,3,-1,2,-1,5,6,17,27,58,111,229,454,913,1819, 3642,7279,14565,29126,58257,116507,233018,466031, 932069,1864134,3728273,7456539,14913082,29826159, 59652325,119304646,238609297,477218587,954437178, 1908874351,3817748709,7635497414] |