n | a(n) |
---|---|
0 | 2 |
1 | 6 |
2 | 8 |
3 | 180 |
4 | 288 |
5 | 10080 |
6 | 17280 |
7 | 453600 |
8 | 806400 |
9 | 47900160 |
10 | 87091200 |
11 | 217945728000 |
12 | 402361344000 |
13 | 2241727488000 |
14 | 4184557977600 |
15 | 2000741783040000 |
16 | 3766102179840000 |
17 | 2838385676206080000 |
18 | 5377993912811520000 |
19 | 1686001091666411520000 |
20 | 3211430650793164800000 |
21 | 423033001181754163200000 |
[2,6,8,180,288,10080,17280,453600,806400,47900160, 87091200,217945728000,402361344000,2241727488000, 4184557977600,2000741783040000,3766102179840000, 2838385676206080000,5377993912811520000, 1686001091666411520000,3211430650793164800000, 423033001181754163200000] |