n | a(n) |
---|---|
4 | 6 |
5 | 40 |
6 | 174 |
7 | 644 |
8 | 2268 |
9 | 8020 |
10 | 28666 |
11 | 103696 |
12 | 379450 |
13 | 1402276 |
14 | 5227366 |
15 | 19633732 |
16 | 74230146 |
17 | 282273744 |
18 | 1078902168 |
19 | 4142578832 |
20 | 15970882784 |
21 | 61798680076 |
22 | 239921541412 |
23 | 934258870200 |
24 | 3648030627298 |
25 | 14280474288676 |
[6,40,174,644,2268,8020,28666,103696,379450, 1402276,5227366,19633732,74230146,282273744, 1078902168,4142578832,15970882784,61798680076, 239921541412,934258870200,3648030627298, 14280474288676] |