n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 5 |
6 | 9 |
7 | 33 |
8 | 85 |
9 | 276 |
10 | 827 |
11 | 2693 |
12 | 8626 |
13 | 28639 |
14 | 95393 |
15 | 323367 |
16 | 1104525 |
17 | 3813797 |
18 | 13266366 |
19 | 46509357 |
20 | 164098390 |
[1,0,1,1,5,9,33,85,276,827,2693,8626,28639,95393, 323367,1104525,3813797,13266366,46509357, 164098390] |