n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 28 |
4 | 117 |
5 | 496 |
6 | 2110 |
7 | 8968 |
8 | 38017 |
9 | 160648 |
10 | 676626 |
11 | 2840872 |
12 | 11892562 |
13 | 49650368 |
14 | 206773372 |
15 | 859186768 |
16 | 3562780057 |
17 | 14746127608 |
18 | 60929182282 |
19 | 251358948328 |
20 | 1035479267542 |
21 | 4260071237728 |
22 | 17505144024292 |
[1,2,7,28,117,496,2110,8968,38017,160648,676626, 2840872,11892562,49650368,206773372,859186768, 3562780057,14746127608,60929182282,251358948328, 1035479267542,4260071237728,17505144024292] |