n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 15 |
6 | 50 |
7 | 181 |
8 | 698 |
9 | 2837 |
10 | 12062 |
11 | 53374 |
12 | 244923 |
13 | 1162536 |
14 | 5697119 |
15 | 28786266 |
16 | 149814059 |
17 | 802436166 |
18 | 4420515689 |
19 | 25031466730 |
20 | 145616087486 |
21 | 869760092469 |
22 | 5330945435272 |
23 | 33508699787635 |
24 | 215863606818041 |
[1,1,1,2,5,15,50,181,698,2837,12062,53374,244923, 1162536,5697119,28786266,149814059,802436166, 4420515689,25031466730,145616087486,869760092469, 5330945435272,33508699787635,215863606818041] |