n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 15 |
4 | 75 |
5 | 259 |
6 | 1295 |
7 | 4865 |
8 | 24325 |
9 | 96141 |
10 | 480705 |
11 | 1963005 |
12 | 9815025 |
13 | 40997637 |
14 | 204988185 |
15 | 870599775 |
16 | 4352998875 |
17 | 18725337979 |
18 | 93626689895 |
19 | 406867433759 |
20 | 2034337168795 |
21 | 8914047523335 |
22 | 44570237616675 |
23 | 196649902923155 |
24 | 983249514615775 |
25 | 4363658368502347 |
26 | 21818291842511735 |
27 | 97316882885983575 |
[1,1,5,15,75,259,1295,4865,24325,96141,480705, 1963005,9815025,40997637,204988185,870599775, 4352998875,18725337979,93626689895,406867433759, 2034337168795,8914047523335,44570237616675, 196649902923155,983249514615775,4363658368502347, 21818291842511735,97316882885983575] |