n | a(n) |
---|---|
2 | 0 |
3 | 1 |
4 | 2 |
5 | 7 |
6 | 23 |
7 | 75 |
8 | 245 |
9 | 801 |
10 | 2622 |
11 | 8595 |
12 | 28215 |
13 | 92751 |
14 | 305304 |
15 | 1006207 |
16 | 3320071 |
17 | 10966741 |
18 | 36261414 |
19 | 120010103 |
20 | 397528422 |
21 | 1317860989 |
22 | 4372180109 |
23 | 14515485973 |
24 | 48222552640 |
25 | 160300772873 |
26 | 533176676911 |
27 | 1774359032599 |
28 | 5907894024527 |
29 | 19680307851415 |
30 | 65588436120988 |
31 | 218679463049627 |
[0,1,2,7,23,75,245,801,2622,8595,28215,92751, 305304,1006207,3320071,10966741,36261414, 120010103,397528422,1317860989,4372180109, 14515485973,48222552640,160300772873,533176676911, 1774359032599,5907894024527,19680307851415, 65588436120988,218679463049627] |