n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 15 |
4 | 106 |
5 | 975 |
6 | 11100 |
7 | 151148 |
8 | 2401365 |
9 | 43681578 |
10 | 896371205 |
11 | 20504034645 |
12 | 517705752096 |
13 | 14310162565395 |
14 | 430020328711305 |
15 | 13963933247986995 |
16 | 487456219774434795 |
17 | 18209055555140970945 |
18 | 724952705958984299025 |
19 | 30650849492427960893946 |
20 | 1371796147488157950190065 |
[1,1,3,15,106,975,11100,151148,2401365,43681578, 896371205,20504034645,517705752096,14310162565395, 430020328711305,13963933247986995, 487456219774434795,18209055555140970945, 724952705958984299025,30650849492427960893946, 1371796147488157950190065] |