n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 10 |
3 | 33 |
4 | 108 |
5 | 352 |
6 | 1145 |
7 | 3721 |
8 | 12087 |
9 | 39254 |
10 | 127469 |
11 | 413908 |
12 | 1343980 |
13 | 4363921 |
14 | 14169633 |
15 | 46008619 |
16 | 149389218 |
17 | 485064009 |
18 | 1574993356 |
19 | 5113971944 |
20 | 16604963593 |
21 | 53915979657 |
22 | 175064088671 |
[1,3,10,33,108,352,1145,3721,12087,39254,127469, 413908,1343980,4363921,14169633,46008619, 149389218,485064009,1574993356,5113971944, 16604963593,53915979657,175064088671] |