n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 18 |
4 | 264 |
5 | 5400 |
6 | 141840 |
7 | 4551120 |
8 | 172529280 |
9 | 7545363840 |
10 | 373944211200 |
11 | 20711190931200 |
12 | 1267784551756800 |
13 | 84991791159475200 |
14 | 6193091146059417600 |
15 | 487361761916020992000 |
16 | 41192820513212239872000 |
17 | 3721763273059549605888000 |
18 | 357950394802026289815552000 |
[1,2,18,264,5400,141840,4551120,172529280, 7545363840,373944211200,20711190931200, 1267784551756800,84991791159475200, 6193091146059417600,487361761916020992000, 41192820513212239872000,3721763273059549605888000, 357950394802026289815552000] |