n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 28 |
4 | 88 |
5 | 277 |
6 | 872 |
7 | 2745 |
8 | 8641 |
9 | 27201 |
10 | 85626 |
11 | 269542 |
12 | 848491 |
13 | 2670964 |
14 | 8407925 |
15 | 26467299 |
16 | 83316385 |
17 | 262271568 |
18 | 825604416 |
19 | 2598919345 |
20 | 8181135700 |
21 | 25753389181 |
22 | 81069068969 |
23 | 255197244033 |
24 | 803335158406 |
25 | 2528817970494 |
[1,3,9,28,88,277,872,2745,8641,27201,85626,269542, 848491,2670964,8407925,26467299,83316385, 262271568,825604416,2598919345,8181135700, 25753389181,81069068969,255197244033,803335158406, 2528817970494] |