n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 5 |
6 | 13 |
7 | 34 |
8 | 110 |
9 | 393 |
10 | 1449 |
11 | 5390 |
12 | 21534 |
13 | 90418 |
14 | 389265 |
15 | 1694769 |
16 | 7593330 |
17 | 34910142 |
18 | 163314286 |
19 | 772044618 |
20 | 3702870682 |
21 | 18017064221 |
22 | 88689351909 |
23 | 440271808570 |
24 | 2205020557614 |
25 | 11141413883818 |
26 | 56737939027682 |
[1,1,1,1,2,5,13,34,110,393,1449,5390,21534,90418, 389265,1694769,7593330,34910142,163314286, 772044618,3702870682,18017064221,88689351909, 440271808570,2205020557614,11141413883818, 56737939027682] |