n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 29 |
6 | 87 |
7 | 273 |
8 | 819 |
9 | 2493 |
10 | 7497 |
11 | 22607 |
12 | 67821 |
13 | 203919 |
14 | 611757 |
15 | 1836363 |
16 | 5509437 |
17 | 16531749 |
18 | 49595247 |
19 | 148796757 |
20 | 446390271 |
21 | 1339201845 |
22 | 4017608811 |
23 | 12052916861 |
24 | 36158750583 |
25 | 108476535993 |
26 | 325429609661 |
27 | 976289644659 |
28 | 2928868963893 |
29 | 8786609348535 |
[1,1,3,9,29,87,273,819,2493,7497,22607,67821, 203919,611757,1836363,5509437,16531749,49595247, 148796757,446390271,1339201845,4017608811, 12052916861,36158750583,108476535993,325429609661, 976289644659,2928868963893,8786609348535] |