n | a(n) |
---|---|
2 | 1 |
3 | 9 |
4 | 37 |
5 | 147 |
6 | 576 |
7 | 2244 |
8 | 8723 |
9 | 33891 |
10 | 131716 |
11 | 512278 |
12 | 1994202 |
13 | 7770734 |
14 | 30310320 |
15 | 118343970 |
16 | 462501135 |
17 | 1809134115 |
18 | 7082699580 |
19 | 27750808470 |
20 | 108812919270 |
21 | 426966196410 |
22 | 1676471166240 |
23 | 6586744582080 |
24 | 25894139638302 |
25 | 101852815940622 |
26 | 400840469986376 |
27 | 1578280410414204 |
[1,9,37,147,576,2244,8723,33891,131716,512278, 1994202,7770734,30310320,118343970,462501135, 1809134115,7082699580,27750808470,108812919270, 426966196410,1676471166240,6586744582080, 25894139638302,101852815940622,400840469986376, 1578280410414204] |