n | a(n) |
---|---|
0 | -1 |
1 | -1 |
2 | 1 |
3 | 5 |
4 | 9 |
5 | 11 |
6 | 17 |
7 | 59 |
8 | 237 |
9 | 849 |
10 | 2861 |
11 | 9625 |
12 | 33057 |
13 | 115753 |
14 | 410581 |
15 | 1469325 |
16 | 5296449 |
17 | 19216691 |
18 | 70134489 |
19 | 257320475 |
20 | 948545125 |
21 | 3511308899 |
22 | 13047504065 |
23 | 48649662439 |
24 | 181967395749 |
25 | 682578873479 |
26 | 2567177040641 |
27 | 9678602093387 |
28 | 36571567691029 |
[-1,-1,1,5,9,11,17,59,237,849,2861,9625,33057, 115753,410581,1469325,5296449,19216691,70134489, 257320475,948545125,3511308899,13047504065, 48649662439,181967395749,682578873479, 2567177040641,9678602093387,36571567691029] |