n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 55 |
5 | 235 |
6 | 1119 |
7 | 5775 |
8 | 31663 |
9 | 182087 |
10 | 1087927 |
11 | 6706823 |
12 | 42433735 |
13 | 274403575 |
14 | 1807700679 |
15 | 12099813111 |
16 | 82113733447 |
17 | 563992581079 |
18 | 3914861387495 |
19 | 27429176467703 |
20 | 193781828188615 |
21 | 1379223584026967 |
[1,2,5,15,55,235,1119,5775,31663,182087,1087927, 6706823,42433735,274403575,1807700679,12099813111, 82113733447,563992581079,3914861387495, 27429176467703,193781828188615,1379223584026967] |