n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 63 |
4 | 433 |
5 | 2823 |
6 | 17657 |
7 | 107439 |
8 | 642529 |
9 | 3802167 |
10 | 22357097 |
11 | 130970271 |
12 | 765564049 |
13 | 4469342439 |
14 | 26073165401 |
15 | 152043343119 |
16 | 886424978881 |
17 | 5167271805207 |
18 | 30119654732489 |
19 | 175558462395135 |
20 | 1023255914549617 |
[1,3,9,63,433,2823,17657,107439,642529,3802167, 22357097,130970271,765564049,4469342439, 26073165401,152043343119,886424978881, 5167271805207,30119654732489,175558462395135, 1023255914549617] |