n | a(n) |
---|---|
1 | 3 |
2 | 9 |
3 | 22 |
4 | 62 |
5 | 172 |
6 | 480 |
7 | 1358 |
8 | 3849 |
9 | 10951 |
10 | 31232 |
11 | 89193 |
12 | 254996 |
13 | 729509 |
14 | 2087983 |
15 | 5978057 |
16 | 17119192 |
17 | 49030629 |
18 | 140440575 |
19 | 402295454 |
20 | 1152434018 |
21 | 3301409215 |
22 | 9457817513 |
23 | 27094931531 |
24 | 77622729861 |
25 | 222378228416 |
26 | 637084878266 |
[3,9,22,62,172,480,1358,3849,10951,31232,89193, 254996,729509,2087983,5978057,17119192,49030629, 140440575,402295454,1152434018,3301409215, 9457817513,27094931531,77622729861,222378228416, 637084878266] |