n | a(n) |
---|---|
1 | 4 |
2 | 72 |
3 | 584 |
4 | 4016 |
5 | 24656 |
6 | 140624 |
7 | 761960 |
8 | 3976704 |
9 | 20173280 |
10 | 100097008 |
11 | 488003448 |
12 | 2345542720 |
13 | 11142878992 |
14 | 52426883056 |
15 | 244682331976 |
16 | 1134222633280 |
17 | 5227498311360 |
18 | 23975219772016 |
19 | 109500177006104 |
20 | 498322800625728 |
21 | 2260840364623472 |
22 | 10230065398683632 |
[4,72,584,4016,24656,140624,761960,3976704, 20173280,100097008,488003448,2345542720, 11142878992,52426883056,244682331976, 1134222633280,5227498311360,23975219772016, 109500177006104,498322800625728,2260840364623472, 10230065398683632] |