n | a(n) |
---|---|
3 | 1 |
4 | 4 |
5 | 14 |
6 | 44 |
7 | 132 |
8 | 384 |
9 | 1096 |
10 | 3088 |
11 | 8624 |
12 | 23936 |
13 | 66144 |
14 | 182208 |
15 | 500800 |
16 | 1374208 |
17 | 3766400 |
18 | 10313984 |
19 | 28226304 |
20 | 77211648 |
21 | 211138048 |
22 | 577223680 |
23 | 1577772032 |
24 | 4312088576 |
25 | 11783915520 |
26 | 32200396800 |
27 | 87985401856 |
28 | 240405151744 |
[1,4,14,44,132,384,1096,3088,8624,23936,66144, 182208,500800,1374208,3766400,10313984,28226304, 77211648,211138048,577223680,1577772032, 4312088576,11783915520,32200396800,87985401856, 240405151744] |