n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 14 |
6 | 43 |
7 | 138 |
8 | 455 |
9 | 1540 |
10 | 5305 |
11 | 18546 |
12 | 65616 |
13 | 234546 |
14 | 845683 |
15 | 3072350 |
16 | 11235393 |
17 | 41326470 |
18 | 152793376 |
19 | 567518950 |
20 | 2116666670 |
21 | 7924062430 |
22 | 29765741831 |
23 | 112157686170 |
24 | 423809991041 |
25 | 1605622028100 |
26 | 6097575361683 |
27 | 23207825593664 |
28 | 88512641860558 |
[1,1,2,5,14,43,138,455,1540,5305,18546,65616, 234546,845683,3072350,11235393,41326470,152793376, 567518950,2116666670,7924062430,29765741831, 112157686170,423809991041,1605622028100, 6097575361683,23207825593664,88512641860558] |