n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 202 |
7 | 857 |
8 | 3933 |
9 | 19373 |
10 | 101755 |
11 | 566712 |
12 | 3331349 |
13 | 20592862 |
14 | 133439286 |
15 | 903926271 |
16 | 6385918342 |
17 | 46950260915 |
18 | 358560107124 |
19 | 2839638581291 |
20 | 23285101241537 |
21 | 197425160416845 |
22 | 1728548417051752 |
23 | 15610025975013920 |
24 | 145242705457704688 |
[1,1,2,5,15,52,202,857,3933,19373,101755,566712, 3331349,20592862,133439286,903926271,6385918342, 46950260915,358560107124,2839638581291, 23285101241537,197425160416845,1728548417051752, 15610025975013920,145242705457704688] |