n | a(n) |
---|---|
0 | 4 |
1 | 80 |
2 | 896 |
3 | 7680 |
4 | 56320 |
5 | 372736 |
6 | 2293760 |
7 | 13369344 |
8 | 74711040 |
9 | 403701760 |
10 | 2122317824 |
11 | 10905190400 |
12 | 54962159616 |
13 | 272461987840 |
14 | 1331439861760 |
15 | 6425271074816 |
16 | 30666066493440 |
17 | 144929376436224 |
18 | 678948430151680 |
[4,80,896,7680,56320,372736,2293760,13369344, 74711040,403701760,2122317824,10905190400, 54962159616,272461987840,1331439861760, 6425271074816,30666066493440,144929376436224, 678948430151680] |