n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 51 |
6 | 188 |
7 | 733 |
8 | 2979 |
9 | 12495 |
10 | 53708 |
11 | 235396 |
12 | 1048168 |
13 | 4728757 |
14 | 21569339 |
15 | 99309057 |
16 | 460932778 |
17 | 2154402107 |
[1,1,2,5,15,51,188,733,2979,12495,53708,235396, 1048168,4728757,21569339,99309057,460932778, 2154402107] |