n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 21 |
4 | 75 |
5 | 274 |
6 | 1016 |
7 | 3807 |
8 | 14377 |
9 | 54627 |
10 | 208584 |
11 | 799669 |
12 | 3076167 |
13 | 11867511 |
14 | 45897145 |
15 | 177888715 |
16 | 690770763 |
17 | 2686879415 |
18 | 10466761637 |
19 | 40828165464 |
20 | 159453481037 |
21 | 623427464093 |
22 | 2439907421914 |
23 | 9557831470082 |
24 | 37472409664888 |
25 | 147028505564603 |
26 | 577302980976146 |
[1,2,6,21,75,274,1016,3807,14377,54627,208584, 799669,3076167,11867511,45897145,177888715, 690770763,2686879415,10466761637,40828165464, 159453481037,623427464093,2439907421914, 9557831470082,37472409664888,147028505564603, 577302980976146] |