n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 74 |
7 | 218 |
8 | 672 |
9 | 2126 |
10 | 6908 |
11 | 22876 |
12 | 77100 |
13 | 263514 |
14 | 911992 |
15 | 3189762 |
16 | 11261448 |
17 | 40083806 |
18 | 143713968 |
19 | 518594034 |
20 | 1882217168 |
21 | 6867064856 |
22 | 25172021144 |
23 | 92666294090 |
24 | 342467464612 |
25 | 1270183943200 |
26 | 4726473541216 |
27 | 17640820790092 |
28 | 66025467919972 |
[1,1,2,4,10,26,74,218,672,2126,6908,22876,77100, 263514,911992,3189762,11261448,40083806,143713968, 518594034,1882217168,6867064856,25172021144, 92666294090,342467464612,1270183943200, 4726473541216,17640820790092,66025467919972] |