n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 51 |
6 | 191 |
7 | 773 |
8 | 3336 |
9 | 15207 |
10 | 72697 |
11 | 362447 |
12 | 1876392 |
13 | 10051083 |
14 | 55544661 |
15 | 315899245 |
16 | 1845139684 |
17 | 11048651523 |
18 | 67719859612 |
19 | 424287619507 |
20 | 2714074517843 |
21 | 17706680249505 |
22 | 117704101959444 |
23 | 796546613501759 |
24 | 5483490237025393 |
25 | 38372546811580251 |
[1,1,2,5,15,51,191,773,3336,15207,72697,362447, 1876392,10051083,55544661,315899245,1845139684, 11048651523,67719859612,424287619507, 2714074517843,17706680249505,117704101959444, 796546613501759,5483490237025393, 38372546811580251] |