n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 36 |
7 | 104 |
8 | 331 |
9 | 1062 |
10 | 3519 |
11 | 11809 |
12 | 40327 |
13 | 139066 |
14 | 484698 |
15 | 1702819 |
16 | 6026452 |
17 | 21460248 |
18 | 76846950 |
19 | 276524978 |
20 | 999423375 |
21 | 3626370269 |
22 | 13205135288 |
23 | 48241233346 |
24 | 176757275833 |
25 | 649399348322 |
26 | 2391817886703 |
[1,1,2,5,12,36,104,331,1062,3519,11809,40327, 139066,484698,1702819,6026452,21460248,76846950, 276524978,999423375,3626370269,13205135288, 48241233346,176757275833,649399348322, 2391817886703] |