n | a(n) |
---|---|
1 | 1 |
2 | 18 |
3 | 2760 |
4 | 1153488 |
5 | 928609920 |
6 | 1224288172800 |
7 | 2398694768870400 |
8 | 6543329233529088000 |
9 | 23715268426751879577600 |
10 | 110245593949982051033088000 |
11 | 639537254337962130647777280000 |
12 | 4528740191242360945670704005120000 |
13 | 38446695454134018174768929636352000000 |
[1,18,2760,1153488,928609920,1224288172800, 2398694768870400,6543329233529088000, 23715268426751879577600, 110245593949982051033088000, 639537254337962130647777280000, 4528740191242360945670704005120000, 38446695454134018174768929636352000000] |