n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 20 |
6 | 45 |
7 | 97 |
8 | 217 |
9 | 476 |
10 | 1043 |
11 | 2256 |
12 | 4890 |
13 | 10540 |
14 | 22695 |
15 | 48614 |
16 | 103856 |
17 | 221103 |
18 | 469738 |
19 | 995299 |
20 | 2104514 |
21 | 4439410 |
22 | 9345471 |
23 | 19631897 |
24 | 41162937 |
25 | 86148416 |
26 | 179987656 |
27 | 375411910 |
28 | 781773332 |
29 | 1625473202 |
30 | 3374684346 |
31 | 6996168098 |
32 | 14483902403 |
33 | 29945326755 |
[1,1,2,4,9,20,45,97,217,476,1043,2256,4890,10540, 22695,48614,103856,221103,469738,995299,2104514, 4439410,9345471,19631897,41162937,86148416, 179987656,375411910,781773332,1625473202, 3374684346,6996168098,14483902403,29945326755] |