n | a(n) |
---|---|
3 | 1 |
4 | 1 |
5 | 2 |
6 | 4 |
7 | 8 |
8 | 23 |
9 | 64 |
10 | 222 |
11 | 752 |
12 | 2805 |
13 | 10475 |
14 | 40614 |
15 | 158994 |
16 | 633456 |
17 | 2548241 |
18 | 10362685 |
19 | 42485242 |
20 | 175557329 |
21 | 730314350 |
22 | 3056971164 |
23 | 12867007761 |
24 | 54434131848 |
25 | 231354091945 |
26 | 987496927875 |
27 | 4231561861914 |
28 | 18198894300129 |
29 | 78533356685275 |
30 | 339958801585826 |
[1,1,2,4,8,23,64,222,752,2805,10475,40614,158994, 633456,2548241,10362685,42485242,175557329, 730314350,3056971164,12867007761,54434131848, 231354091945,987496927875,4231561861914, 18198894300129,78533356685275,339958801585826] |