n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 3 |
6 | 4 |
7 | 12 |
8 | 15 |
9 | 40 |
10 | 51 |
11 | 135 |
12 | 175 |
13 | 455 |
14 | 596 |
15 | 1540 |
16 | 2037 |
17 | 5250 |
18 | 7000 |
19 | 18000 |
20 | 24156 |
21 | 62007 |
22 | 83667 |
23 | 214467 |
24 | 290719 |
25 | 744315 |
26 | 1012935 |
27 | 2590679 |
28 | 3537703 |
29 | 9039823 |
30 | 12381252 |
31 | 31612324 |
32 | 43411489 |
33 | 110761494 |
34 | 152459010 |
[0,0,0,0,3,4,12,15,40,51,135,175,455,596,1540, 2037,5250,7000,18000,24156,62007,83667,214467, 290719,744315,1012935,2590679,3537703,9039823, 12381252,31612324,43411489,110761494,152459010] |