n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 0 |
4 | 5 |
5 | 2 |
6 | 25 |
7 | 20 |
8 | 129 |
9 | 150 |
10 | 685 |
11 | 1008 |
12 | 3725 |
13 | 6410 |
14 | 20641 |
15 | 39500 |
16 | 116025 |
17 | 238782 |
18 | 659125 |
19 | 1425960 |
20 | 3773189 |
21 | 8448050 |
22 | 21717865 |
23 | 49786628 |
24 | 125485425 |
25 | 292368870 |
26 | 727000381 |
27 | 1712815200 |
28 | 4219739645 |
29 | 10018076762 |
30 | 24524328625 |
31 | 58529863100 |
[0,0,1,0,5,2,25,20,129,150,685,1008,3725,6410, 20641,39500,116025,238782,659125,1425960,3773189, 8448050,21717865,49786628,125485425,292368870, 727000381,1712815200,4219739645,10018076762, 24524328625,58529863100] |