n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 15 |
4 | 55 |
5 | 215 |
6 | 875 |
7 | 3533 |
8 | 14769 |
9 | 63025 |
10 | 271061 |
11 | 1171573 |
12 | 5125689 |
13 | 22634577 |
14 | 100374805 |
15 | 446869675 |
16 | 2001901659 |
17 | 9014772611 |
18 | 40708594111 |
19 | 184335519819 |
20 | 837884736507 |
21 | 3821043268147 |
22 | 17460417237311 |
23 | 79944561997591 |
24 | 366975174492475 |
25 | 1688354607241075 |
26 | 7779433515441811 |
27 | 35898846545834367 |
[1,1,5,15,55,215,875,3533,14769,63025,271061, 1171573,5125689,22634577,100374805,446869675, 2001901659,9014772611,40708594111,184335519819, 837884736507,3821043268147,17460417237311, 79944561997591,366975174492475,1688354607241075, 7779433515441811,35898846545834367] |