n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 16 |
5 | 77 |
6 | 730 |
7 | 8578 |
8 | 132422 |
9 | 2394795 |
10 | 50031012 |
11 | 1179054376 |
12 | 30959574248 |
13 | 896082610429 |
14 | 28346986843640 |
15 | 973097619619654 |
16 | 36028798243701780 |
17 | 1431211529242786625 |
18 | 60719765604009463866 |
19 | 2740193429053744941868 |
20 | 131072000002841600036024 |
[1,1,2,4,16,77,730,8578,132422,2394795,50031012, 1179054376,30959574248,896082610429, 28346986843640,973097619619654,36028798243701780, 1431211529242786625,60719765604009463866, 2740193429053744941868,131072000002841600036024] |