n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 3 |
7 | 9 |
8 | 28 |
9 | 85 |
10 | 262 |
11 | 827 |
12 | 2651 |
13 | 8626 |
14 | 28507 |
15 | 95393 |
16 | 322938 |
17 | 1104525 |
18 | 3812367 |
19 | 13266366 |
20 | 46504495 |
21 | 164098390 |
22 | 582521687 |
23 | 2079133141 |
24 | 7457788295 |
25 | 26872946466 |
26 | 97238824018 |
27 | 353218128299 |
28 | 1287657977946 |
29 | 4709784136316 |
[1,1,0,0,0,1,3,9,28,85,262,827,2651,8626,28507, 95393,322938,1104525,3812367,13266366,46504495, 164098390,582521687,2079133141,7457788295, 26872946466,97238824018,353218128299, 1287657977946,4709784136316] |