n | a(n) |
---|---|
6 | 1 |
7 | 56 |
8 | 2016 |
9 | 59640 |
10 | 1581580 |
11 | 39175752 |
12 | 927048304 |
13 | 21243342120 |
14 | 475491062970 |
15 | 10456592670160 |
16 | 226846154180800 |
17 | 4868956823342976 |
18 | 103619293824707388 |
19 | 2190038132512694800 |
20 | 46026828991565696400 |
[1,56,2016,59640,1581580,39175752,927048304, 21243342120,475491062970,10456592670160, 226846154180800,4868956823342976, 103619293824707388,2190038132512694800, 46026828991565696400] |