n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 202 |
7 | 855 |
8 | 3845 |
9 | 18002 |
10 | 86472 |
11 | 422005 |
12 | 2079475 |
13 | 10306752 |
14 | 51263942 |
15 | 255514355 |
16 | 1275163905 |
17 | 6368612302 |
18 | 31821472612 |
19 | 159042661905 |
20 | 795019337135 |
21 | 3974515030652 |
22 | 19870830712482 |
23 | 99348921288655 |
[1,1,2,5,15,52,202,855,3845,18002,86472,422005, 2079475,10306752,51263942,255514355,1275163905, 6368612302,31821472612,159042661905,795019337135, 3974515030652,19870830712482,99348921288655] |