n | a(n) |
---|---|
1 | 4 |
2 | 8 |
3 | 20 |
4 | 60 |
5 | 204 |
6 | 748 |
7 | 2860 |
8 | 11180 |
9 | 44204 |
10 | 175788 |
11 | 701100 |
12 | 2800300 |
13 | 11193004 |
14 | 44755628 |
15 | 178989740 |
16 | 715893420 |
17 | 2863442604 |
18 | 11453508268 |
19 | 45813508780 |
20 | 183252986540 |
21 | 733009849004 |
22 | 2932035201708 |
23 | 11728132418220 |
24 | 46912512895660 |
[4,8,20,60,204,748,2860,11180,44204,175788,701100, 2800300,11193004,44755628,178989740,715893420, 2863442604,11453508268,45813508780,183252986540, 733009849004,2932035201708,11728132418220, 46912512895660] |