n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 132 |
5 | 792 |
6 | 33264 |
7 | 266112 |
8 | 19958400 |
9 | 618710400 |
10 | 66820723200 |
11 | 801848678400 |
12 | 1425686950195200 |
13 | 19959617302732800 |
14 | 4111681164362956800 |
15 | 962133392460931891200 |
16 | 1057384598314564148428800 |
17 | 19032922769662154671718400 |
18 | 112313277263776374717810278400 |
[1,3,12,132,792,33264,266112,19958400,618710400, 66820723200,801848678400,1425686950195200, 19959617302732800,4111681164362956800, 962133392460931891200,1057384598314564148428800, 19032922769662154671718400, 112313277263776374717810278400] |