n | a(n) |
---|---|
1 | 3 |
2 | 9 |
3 | 27 |
4 | 81 |
5 | 240 |
6 | 714 |
7 | 2124 |
8 | 6318 |
9 | 18792 |
10 | 55896 |
11 | 166260 |
12 | 494532 |
13 | 1470960 |
14 | 4375296 |
15 | 13014096 |
16 | 38709768 |
17 | 115140240 |
18 | 342478800 |
19 | 1018685808 |
20 | 3030029232 |
21 | 9012668160 |
22 | 26807724000 |
23 | 79738214400 |
24 | 237177271584 |
25 | 705471756288 |
26 | 2098389932544 |
[3,9,27,81,240,714,2124,6318,18792,55896,166260, 494532,1470960,4375296,13014096,38709768, 115140240,342478800,1018685808,3030029232, 9012668160,26807724000,79738214400,237177271584, 705471756288,2098389932544] |