n | a(n) |
---|---|
1 | 4 |
2 | 61 |
3 | 274 |
4 | 1764 |
5 | 13068 |
6 | 109584 |
7 | 1026576 |
8 | 10628640 |
9 | 120543840 |
10 | 1486442880 |
11 | 19802759040 |
12 | 283465647360 |
13 | 4339163001600 |
14 | 70734282393600 |
15 | 1223405590579200 |
16 | 22376988058521600 |
17 | 431565146817638400 |
18 | 8752948036761600000 |
19 | 186244810780170240000 |
20 | 4148476779335454720000 |
[4,61,274,1764,13068,109584,1026576,10628640, 120543840,1486442880,19802759040,283465647360, 4339163001600,70734282393600,1223405590579200, 22376988058521600,431565146817638400, 8752948036761600000,186244810780170240000, 4148476779335454720000] |