n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 6 |
5 | 1 |
6 | 30 |
7 | 1 |
8 | 140 |
9 | 1 |
10 | 630 |
11 | 1 |
12 | 2772 |
13 | 1 |
14 | 12012 |
15 | 1 |
16 | 51480 |
17 | 1 |
18 | 218790 |
19 | 1 |
20 | 923780 |
21 | 1 |
22 | 3879876 |
23 | 1 |
24 | 16224936 |
25 | 1 |
26 | 67603900 |
27 | 1 |
28 | 280816200 |
29 | 1 |
30 | 1163381400 |
31 | 1 |
32 | 4808643120 |
33 | 1 |
34 | 19835652870 |
35 | 1 |
36 | 81676217700 |
37 | 1 |
38 | 335780006100 |
39 | 1 |
40 | 1378465288200 |
41 | 1 |
[1,1,1,6,1,30,1,140,1,630,1,2772,1,12012,1,51480, 1,218790,1,923780,1,3879876,1,16224936,1,67603900, 1,280816200,1,1163381400,1,4808643120,1, 19835652870,1,81676217700,1,335780006100,1, 1378465288200,1] |