n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 4 |
6 | 9 |
7 | 23 |
8 | 62 |
9 | 176 |
10 | 512 |
11 | 1551 |
12 | 4822 |
13 | 15266 |
14 | 49141 |
15 | 160728 |
16 | 532890 |
17 | 1785162 |
18 | 6039328 |
19 | 20617808 |
20 | 70951548 |
21 | 245911020 |
22 | 857888714 |
23 | 3010811846 |
24 | 10624583264 |
25 | 37680980256 |
26 | 134260382400 |
27 | 480440869030 |
28 | 1726092837412 |
29 | 6224442777366 |
30 | 22523780202156 |
[1,1,1,1,2,4,9,23,62,176,512,1551,4822,15266, 49141,160728,532890,1785162,6039328,20617808, 70951548,245911020,857888714,3010811846, 10624583264,37680980256,134260382400,480440869030, 1726092837412,6224442777366,22523780202156] |