n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 0 |
3 | 2 |
4 | 2 |
5 | 7 |
6 | 14 |
7 | 41 |
8 | 107 |
9 | 307 |
10 | 871 |
11 | 2546 |
12 | 7497 |
13 | 22380 |
14 | 67366 |
15 | 204517 |
16 | 625132 |
17 | 1922700 |
18 | 5945469 |
19 | 18473841 |
20 | 57649699 |
21 | 180602285 |
22 | 567772883 |
23 | 1790663427 |
24 | 5663969707 |
25 | 17963483548 |
26 | 57112388657 |
27 | 181994536484 |
28 | 581168157605 |
[0,1,0,2,2,7,14,41,107,307,871,2546,7497,22380, 67366,204517,625132,1922700,5945469,18473841, 57649699,180602285,567772883,1790663427, 5663969707,17963483548,57112388657,181994536484, 581168157605] |