n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 18 |
4 | 216 |
5 | 9720 |
6 | 9720 |
7 | 1224720 |
8 | 29393280 |
9 | 18895680 |
10 | 1984046400 |
11 | 32736765600 |
12 | 392841187200 |
13 | 183849675609600 |
14 | 4211828932147200 |
15 | 25738954585344000 |
16 | 8339421285651456000 |
17 | 21265524278411212800 |
18 | 437462213727316377600 |
[1,6,18,216,9720,9720,1224720,29393280,18895680, 1984046400,32736765600,392841187200, 183849675609600,4211828932147200, 25738954585344000,8339421285651456000, 21265524278411212800,437462213727316377600] |