n | a(n) |
---|---|
1 | 3 |
2 | 40 |
3 | 336 |
4 | 2304 |
5 | 14080 |
6 | 79872 |
7 | 430080 |
8 | 2228224 |
9 | 11206656 |
10 | 55050240 |
11 | 265289728 |
12 | 1258291200 |
13 | 5888802816 |
14 | 27246198784 |
15 | 124822487040 |
16 | 566935683072 |
17 | 2555505541120 |
18 | 11441792876544 |
19 | 50921132261376 |
20 | 225399883694080 |
21 | 992858999881728 |
22 | 4354066045992960 |
[3,40,336,2304,14080,79872,430080,2228224, 11206656,55050240,265289728,1258291200,5888802816, 27246198784,124822487040,566935683072, 2555505541120,11441792876544,50921132261376, 225399883694080,992858999881728,4354066045992960] |