n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 6 |
6 | 15 |
7 | 34 |
8 | 105 |
9 | 384 |
10 | 1658 |
11 | 8135 |
12 | 41407 |
13 | 205211 |
14 | 963708 |
15 | 4231059 |
16 | 17295730 |
17 | 65807588 |
18 | 233346408 |
19 | 772518828 |
20 | 2392611091 |
21 | 6946116261 |
22 | 18937468347 |
23 | 48568206996 |
[1,1,1,2,3,6,15,34,105,384,1658,8135,41407,205211, 963708,4231059,17295730,65807588,233346408, 772518828,2392611091,6946116261,18937468347, 48568206996] |