n | a(n) |
---|---|
1 | 2 |
2 | 6 |
3 | 28 |
4 | 54 |
5 | 405 |
6 | 486 |
7 | 2808 |
8 | 4860 |
9 | 21870 |
10 | 40824 |
11 | 192456 |
12 | 524160 |
13 | 708588 |
14 | 4059072 |
15 | 14348907 |
16 | 58576608 |
17 | 123731712 |
18 | 462944160 |
19 | 1837080000 |
20 | 3874204890 |
21 | 11809800000 |
22 | 48183984000 |
23 | 65086642152 |
24 | 339033848832 |
25 | 1360965131136 |
26 | 2928898896840 |
27 | 6595446404736 |
[2,6,28,54,405,486,2808,4860,21870,40824,192456, 524160,708588,4059072,14348907,58576608,123731712, 462944160,1837080000,3874204890,11809800000, 48183984000,65086642152,339033848832, 1360965131136,2928898896840,6595446404736] |