n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 40 |
5 | 103 |
6 | 723 |
7 | 1941 |
8 | 15060 |
9 | 41382 |
10 | 340657 |
11 | 950061 |
12 | 8132676 |
13 | 22916139 |
14 | 201684153 |
15 | 572618987 |
16 | 5145063940 |
17 | 14692661910 |
18 | 134152006842 |
19 | 384852888898 |
20 | 3559210821120 |
21 | 10248531332559 |
22 | 95777105998365 |
23 | 276630878235275 |
24 | 2607824127882204 |
25 | 7551545042631558 |
26 | 71714198513326425 |
[1,1,3,7,40,103,723,1941,15060,41382,340657, 950061,8132676,22916139,201684153,572618987, 5145063940,14692661910,134152006842,384852888898, 3559210821120,10248531332559,95777105998365, 276630878235275,2607824127882204,7551545042631558, 71714198513326425] |