n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 32 |
6 | 119 |
7 | 466 |
8 | 1881 |
9 | 7788 |
10 | 32868 |
11 | 140907 |
12 | 611871 |
13 | 2685732 |
14 | 11896906 |
15 | 53115412 |
16 | 238767737 |
17 | 1079780412 |
18 | 4909067468 |
19 | 22424085244 |
20 | 102865595140 |
21 | 473678981820 |
22 | 2188774576575 |
23 | 10145798119530 |
24 | 47165267330415 |
25 | 219839845852692 |
26 | 1027183096151244 |
27 | 4810235214490986 |
[0,1,1,3,9,32,119,466,1881,7788,32868,140907, 611871,2685732,11896906,53115412,238767737, 1079780412,4909067468,22424085244,102865595140, 473678981820,2188774576575,10145798119530, 47165267330415,219839845852692,1027183096151244, 4810235214490986] |