n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 16 |
4 | 59 |
5 | 247 |
6 | 1111 |
7 | 5302 |
8 | 26376 |
9 | 135670 |
10 | 716542 |
11 | 3868142 |
12 | 21265884 |
13 | 118741369 |
14 | 671906876 |
15 | 3846342253 |
16 | 22243294360 |
17 | 129793088770 |
18 | 763444949789 |
19 | 4522896682789 |
20 | 26968749517543 |
21 | 161750625450884 |
[1,2,5,16,59,247,1111,5302,26376,135670,716542, 3868142,21265884,118741369,671906876,3846342253, 22243294360,129793088770,763444949789, 4522896682789,26968749517543,161750625450884] |