n | a(n) |
---|---|
0 | 4 |
1 | 15 |
2 | 59 |
3 | 235 |
4 | 939 |
5 | 3755 |
6 | 15019 |
7 | 60075 |
8 | 240299 |
9 | 961195 |
10 | 3844779 |
11 | 15379115 |
12 | 61516459 |
13 | 246065835 |
14 | 984263339 |
15 | 3937053355 |
16 | 15748213419 |
17 | 62992853675 |
18 | 251971414699 |
19 | 1007885658795 |
20 | 4031542635179 |
21 | 16126170540715 |
22 | 64504682162859 |
[4,15,59,235,939,3755,15019,60075,240299,961195, 3844779,15379115,61516459,246065835,984263339, 3937053355,15748213419,62992853675,251971414699, 1007885658795,4031542635179,16126170540715, 64504682162859] |