n | a(n) |
---|---|
1 | 20 |
2 | 520 |
3 | 5880 |
4 | 48720 |
5 | 341880 |
6 | 2162160 |
7 | 12732720 |
8 | 71179680 |
9 | 382444920 |
10 | 1991669680 |
11 | 10113543440 |
12 | 50297301600 |
13 | 245807780400 |
14 | 1183546677600 |
15 | 5626112450400 |
16 | 26447537160000 |
17 | 123113285479800 |
18 | 568139770321200 |
19 | 2601623487262800 |
20 | 11830908080191200 |
21 | 53465154668125200 |
22 | 240246019677549600 |
[20,520,5880,48720,341880,2162160,12732720, 71179680,382444920,1991669680,10113543440, 50297301600,245807780400,1183546677600, 5626112450400,26447537160000,123113285479800, 568139770321200,2601623487262800, 11830908080191200,53465154668125200, 240246019677549600] |