n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 18 |
4 | 144 |
5 | 12000 |
6 | 540000 |
7 | 388962000 |
8 | 108425318400 |
9 | 650403212820480 |
10 | 1175952237465600000 |
11 | 57409367332363200000000 |
12 | 691636564481660937216000000 |
13 | 270540272566435932512004833280000 |
[1,2,18,144,12000,540000,388962000,108425318400, 650403212820480,1175952237465600000, 57409367332363200000000, 691636564481660937216000000, 270540272566435932512004833280000] |