n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 91 |
6 | 408 |
7 | 1939 |
8 | 9635 |
9 | 49614 |
10 | 263140 |
11 | 1431301 |
12 | 7959568 |
13 | 45152340 |
14 | 260847526 |
15 | 1532825675 |
16 | 9154581802 |
17 | 55537885743 |
18 | 342147577227 |
19 | 2140251570508 |
20 | 13594688301758 |
21 | 87702596534110 |
22 | 574815620158265 |
23 | 3829029514213952 |
[1,1,2,6,22,91,408,1939,9635,49614,263140,1431301, 7959568,45152340,260847526,1532825675,9154581802, 55537885743,342147577227,2140251570508, 13594688301758,87702596534110,574815620158265, 3829029514213952] |