n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 33 |
7 | 90 |
8 | 261 |
9 | 766 |
10 | 2311 |
11 | 7065 |
12 | 21955 |
13 | 68921 |
14 | 218640 |
15 | 699161 |
16 | 2252410 |
17 | 7301482 |
18 | 23802026 |
19 | 77973162 |
20 | 256565366 |
21 | 847555502 |
22 | 2809934472 |
23 | 9346232579 |
24 | 31179372180 |
25 | 104298865434 |
26 | 349766936468 |
27 | 1175657140783 |
28 | 3960143985167 |
29 | 13366048810561 |
[0,1,1,2,5,12,33,90,261,766,2311,7065,21955,68921, 218640,699161,2252410,7301482,23802026,77973162, 256565366,847555502,2809934472,9346232579, 31179372180,104298865434,349766936468, 1175657140783,3960143985167,13366048810561] |