n | a(n) |
---|---|
1 | 3 |
2 | 9 |
3 | 27 |
4 | 78 |
5 | 222 |
6 | 622 |
7 | 1722 |
8 | 4719 |
9 | 12821 |
10 | 34575 |
11 | 92637 |
12 | 246788 |
13 | 654120 |
14 | 1725900 |
15 | 4535172 |
16 | 11872941 |
17 | 30977943 |
18 | 80575109 |
19 | 208983471 |
20 | 540606474 |
21 | 1395061474 |
22 | 3591893274 |
23 | 9228660318 |
24 | 23664610747 |
25 | 60570324105 |
26 | 154763821419 |
27 | 394795932561 |
[3,9,27,78,222,622,1722,4719,12821,34575,92637, 246788,654120,1725900,4535172,11872941,30977943, 80575109,208983471,540606474,1395061474, 3591893274,9228660318,23664610747,60570324105, 154763821419,394795932561] |