n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 20 |
7 | 48 |
8 | 114 |
9 | 278 |
10 | 676 |
11 | 1653 |
12 | 4027 |
13 | 9816 |
14 | 23843 |
15 | 57833 |
16 | 139908 |
17 | 337856 |
18 | 814127 |
19 | 1958524 |
20 | 4703322 |
21 | 11278027 |
22 | 27003707 |
23 | 64571463 |
24 | 154207616 |
25 | 367841733 |
26 | 876450881 |
27 | 2086098057 |
28 | 4960230005 |
29 | 11782852600 |
30 | 27963874395 |
31 | 66307010599 |
[1,1,1,2,4,9,20,48,114,278,676,1653,4027,9816, 23843,57833,139908,337856,814127,1958524,4703322, 11278027,27003707,64571463,154207616,367841733, 876450881,2086098057,4960230005,11782852600, 27963874395,66307010599] |