n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 1 |
3 | 1 |
4 | 6 |
5 | 4 |
6 | 20 |
7 | 5 |
8 | 70 |
9 | 56 |
10 | 504 |
11 | 420 |
12 | 4620 |
13 | 3960 |
14 | 3432 |
15 | 3003 |
16 | 90090 |
17 | 80080 |
18 | 1361360 |
19 | 408408 |
20 | 369512 |
21 | 67184 |
22 | 470288 |
23 | 1293292 |
24 | 29745716 |
25 | 27457584 |
26 | 228813200 |
27 | 212469400 |
28 | 5736673800 |
29 | 5354228880 |
30 | 155272637520 |
31 | 145568097675 |
32 | 273491577450 |
33 | 257403837600 |
[1,2,1,1,6,4,20,5,70,56,504,420,4620,3960,3432, 3003,90090,80080,1361360,408408,369512,67184, 470288,1293292,29745716,27457584,228813200, 212469400,5736673800,5354228880,155272637520, 145568097675,273491577450,257403837600] |