n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 3 |
4 | 13 |
5 | 55 |
6 | 256 |
7 | 1274 |
8 | 6791 |
9 | 38553 |
10 | 232171 |
11 | 1477355 |
12 | 9898780 |
13 | 69621864 |
14 | 512585529 |
15 | 3940556611 |
16 | 31560327945 |
17 | 262805569159 |
18 | 2271094695388 |
19 | 20333574916690 |
20 | 188322882941471 |
21 | 1801737999086129 |
22 | 17783472151154007 |
23 | 180866601699482803 |
24 | 1893373126840572056 |
[0,1,3,13,55,256,1274,6791,38553,232171,1477355, 9898780,69621864,512585529,3940556611,31560327945, 262805569159,2271094695388,20333574916690, 188322882941471,1801737999086129, 17783472151154007,180866601699482803, 1893373126840572056] |