n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 23 |
5 | 71 |
6 | 245 |
7 | 844 |
8 | 3031 |
9 | 11023 |
10 | 40890 |
11 | 153456 |
12 | 582868 |
13 | 2234096 |
14 | 8634800 |
15 | 33607223 |
16 | 131619098 |
17 | 518285703 |
18 | 2050849866 |
19 | 8150520122 |
20 | 32519072805 |
21 | 130205541912 |
22 | 523022475545 |
23 | 2107119140699 |
24 | 8511959958494 |
25 | 34470547999253 |
26 | 139914333878668 |
27 | 569112388312690 |
[1,1,3,7,23,71,245,844,3031,11023,40890,153456, 582868,2234096,8634800,33607223,131619098, 518285703,2050849866,8150520122,32519072805, 130205541912,523022475545,2107119140699, 8511959958494,34470547999253,139914333878668, 569112388312690] |