n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 21 |
5 | 61 |
6 | 183 |
7 | 543 |
8 | 1629 |
9 | 4873 |
10 | 14619 |
11 | 43815 |
12 | 131445 |
13 | 394213 |
14 | 1182639 |
15 | 3547551 |
16 | 10642653 |
17 | 31926873 |
18 | 95780619 |
19 | 287338599 |
20 | 862015797 |
21 | 2586037645 |
22 | 7758112935 |
23 | 23274309567 |
24 | 69822928701 |
25 | 209468698473 |
26 | 628406095419 |
[1,1,3,7,21,61,183,543,1629,4873,14619,43815, 131445,394213,1182639,3547551,10642653,31926873, 95780619,287338599,862015797,2586037645, 7758112935,23274309567,69822928701,209468698473, 628406095419] |