n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 31 |
7 | 83 |
8 | 227 |
9 | 634 |
10 | 1799 |
11 | 5171 |
12 | 15027 |
13 | 44074 |
14 | 130299 |
15 | 387880 |
16 | 1161665 |
17 | 3497734 |
18 | 10581819 |
19 | 32150411 |
20 | 98057835 |
21 | 300116888 |
22 | 921456715 |
23 | 2837379238 |
24 | 8760199757 |
25 | 27112737988 |
26 | 84103586027 |
27 | 261435982873 |
28 | 814257033047 |
[0,1,1,2,5,12,31,83,227,634,1799,5171,15027,44074, 130299,387880,1161665,3497734,10581819,32150411, 98057835,300116888,921456715,2837379238, 8760199757,27112737988,84103586027,261435982873, 814257033047] |