n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 5 |
6 | 3 |
7 | 5 |
8 | 28 |
9 | 57 |
10 | 90 |
11 | 241 |
12 | 684 |
13 | 1391 |
14 | 3368 |
15 | 9387 |
16 | 22377 |
17 | 55330 |
18 | 147531 |
19 | 379551 |
20 | 976967 |
21 | 2572030 |
22 | 6776369 |
23 | 17834031 |
24 | 47207259 |
25 | 125487309 |
26 | 333813100 |
27 | 889652401 |
28 | 2378119544 |
29 | 6367722606 |
30 | 17075640443 |
31 | 45881515131 |
[0,0,5,3,5,28,57,90,241,684,1391,3368,9387,22377, 55330,147531,379551,976967,2572030,6776369, 17834031,47207259,125487309,333813100,889652401, 2378119544,6367722606,17075640443,45881515131] |