n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 77 |
6 | 287 |
7 | 1079 |
8 | 4082 |
9 | 15522 |
10 | 59280 |
11 | 227240 |
12 | 873886 |
13 | 3370030 |
14 | 13027730 |
15 | 50469890 |
16 | 195892565 |
17 | 761615285 |
18 | 2965576715 |
19 | 11563073315 |
20 | 45141073925 |
21 | 176423482325 |
22 | 690215089745 |
23 | 2702831489825 |
24 | 10593202603775 |
25 | 41550902139551 |
26 | 163099562175851 |
[1,1,2,6,21,77,287,1079,4082,15522,59280,227240, 873886,3370030,13027730,50469890,195892565, 761615285,2965576715,11563073315,45141073925, 176423482325,690215089745,2702831489825, 10593202603775,41550902139551,163099562175851] |