n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 22 |
5 | 67 |
6 | 228 |
7 | 775 |
8 | 2787 |
9 | 10126 |
10 | 37764 |
11 | 143329 |
12 | 550368 |
13 | 2149095 |
14 | 8453575 |
15 | 33691399 |
16 | 135090849 |
17 | 547090691 |
18 | 2227753448 |
19 | 9139576254 |
20 | 37693231937 |
21 | 156318494839 |
22 | 651542940226 |
23 | 2727163759562 |
24 | 11468106477863 |
25 | 48390347257167 |
26 | 205025987747295 |
27 | 871248671621395 |
28 | 3715469560288270 |
[1,1,3,7,22,67,228,775,2787,10126,37764,143329, 550368,2149095,8453575,33691399,135090849, 547090691,2227753448,9139576254,37693231937, 156318494839,651542940226,2727163759562, 11468106477863,48390347257167,205025987747295, 871248671621395,3715469560288270] |