n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 0 |
4 | 6 |
5 | 0 |
6 | 20 |
7 | 0 |
8 | 70 |
9 | 0 |
10 | 252 |
11 | 0 |
12 | 924 |
13 | 0 |
14 | 3432 |
15 | 0 |
16 | 12870 |
17 | 0 |
18 | 48620 |
19 | 0 |
20 | 184756 |
21 | 0 |
22 | 705432 |
23 | 0 |
24 | 2704156 |
25 | 0 |
26 | 10400600 |
27 | 0 |
28 | 40116600 |
29 | 0 |
30 | 155117520 |
31 | 0 |
32 | 601080390 |
33 | 0 |
34 | 2333606220 |
35 | 0 |
36 | 9075135300 |
37 | 0 |
38 | 35345263800 |
39 | 0 |
40 | 137846528820 |
41 | 0 |
42 | 538257874440 |
43 | 0 |
[1,0,2,0,6,0,20,0,70,0,252,0,924,0,3432,0,12870,0, 48620,0,184756,0,705432,0,2704156,0,10400600,0, 40116600,0,155117520,0,601080390,0,2333606220,0, 9075135300,0,35345263800,0,137846528820,0, 538257874440,0] |