n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 20 |
3 | 70 |
4 | 112 |
5 | 352 |
6 | 1232 |
7 | 22880 |
8 | 183040 |
9 | 1244672 |
10 | 30098432 |
11 | 72352 |
12 | 2472371200 |
13 | 115763200 |
14 | 441223168 |
15 | 6838959104 |
16 | 61568122880 |
17 | 745298329600 |
18 | 28321336524800 |
19 | 1103041527808 |
20 | 573581594460160 |
21 | 4275790067793920 |
22 | 49961677422592 |
[1,2,20,70,112,352,1232,22880,183040,1244672, 30098432,72352,2472371200,115763200,441223168, 6838959104,61568122880,745298329600, 28321336524800,1103041527808,573581594460160, 4275790067793920,49961677422592] |