n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 15 |
4 | 55 |
5 | 170 |
6 | 571 |
7 | 1789 |
8 | 5727 |
9 | 17836 |
10 | 55627 |
11 | 171169 |
12 | 524879 |
13 | 1595896 |
14 | 4829894 |
15 | 14527981 |
16 | 43497312 |
17 | 129588391 |
18 | 384430264 |
19 | 1135607519 |
20 | 3341662498 |
21 | 9796626673 |
22 | 28620419254 |
23 | 83334382425 |
24 | 241879403752 |
25 | 699937499318 |
26 | 2019607806247 |
27 | 5811320364410 |
28 | 16677611788799 |
[1,1,5,15,55,170,571,1789,5727,17836,55627,171169, 524879,1595896,4829894,14527981,43497312, 129588391,384430264,1135607519,3341662498, 9796626673,28620419254,83334382425,241879403752, 699937499318,2019607806247,5811320364410, 16677611788799] |