n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 2 |
7 | 6 |
8 | 16 |
9 | 43 |
10 | 117 |
11 | 305 |
12 | 769 |
13 | 1907 |
14 | 4686 |
15 | 11587 |
16 | 28580 |
17 | 70451 |
18 | 172880 |
19 | 423629 |
20 | 1036332 |
21 | 2533559 |
22 | 6186635 |
23 | 15092985 |
24 | 36784586 |
25 | 89590410 |
26 | 218069921 |
27 | 530551804 |
28 | 1290218120 |
29 | 3136385254 |
30 | 7621522229 |
31 | 18515039477 |
32 | 44966884766 |
33 | 109184448962 |
[1,1,0,0,0,1,2,6,16,43,117,305,769,1907,4686, 11587,28580,70451,172880,423629,1036332,2533559, 6186635,15092985,36784586,89590410,218069921, 530551804,1290218120,3136385254,7621522229, 18515039477,44966884766,109184448962] |