n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 3 |
5 | 8 |
6 | 20 |
7 | 47 |
8 | 107 |
9 | 238 |
10 | 520 |
11 | 1121 |
12 | 2391 |
13 | 5056 |
14 | 10616 |
15 | 22159 |
16 | 46023 |
17 | 95182 |
18 | 196132 |
19 | 402873 |
20 | 825259 |
21 | 1686408 |
22 | 3438828 |
23 | 6999071 |
24 | 14221459 |
25 | 28853662 |
26 | 58462800 |
27 | 118315137 |
28 | 239186031 |
29 | 483072832 |
30 | 974791728 |
31 | 1965486047 |
[0,0,1,3,8,20,47,107,238,520,1121,2391,5056,10616, 22159,46023,95182,196132,402873,825259,1686408, 3438828,6999071,14221459,28853662,58462800, 118315137,239186031,483072832,974791728, 1965486047] |