n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 31 |
4 | 117 |
5 | 459 |
6 | 1825 |
7 | 7287 |
8 | 29133 |
9 | 116515 |
10 | 466041 |
11 | 1864143 |
12 | 7456549 |
13 | 29826171 |
14 | 119304657 |
15 | 477218599 |
16 | 1908874365 |
17 | 7635497427 |
18 | 30541989673 |
19 | 122167958655 |
20 | 488671834581 |
21 | 1954687338283 |
22 | 7818749353089 |
23 | 31274997412311 |
[1,3,9,31,117,459,1825,7287,29133,116515,466041, 1864143,7456549,29826171,119304657,477218599, 1908874365,7635497427,30541989673,122167958655, 488671834581,1954687338283,7818749353089, 31274997412311] |