n | a(n) |
---|---|
2 | 1 |
3 | 2 |
4 | 12 |
5 | 35 |
6 | 266 |
7 | 2486 |
8 | 28781 |
9 | 409929 |
10 | 6824303 |
11 | 130615525 |
12 | 2846762052 |
13 | 69481280019 |
14 | 1875107560799 |
15 | 55466043249309 |
16 | 1791220240413582 |
17 | 62561482660495103 |
18 | 2351822439519905841 |
19 | 94645194753881075173 |
20 | 4053272062427790574310 |
21 | 185031225489554592624010 |
[1,2,12,35,266,2486,28781,409929,6824303, 130615525,2846762052,69481280019,1875107560799, 55466043249309,1791220240413582,62561482660495103, 2351822439519905841,94645194753881075173, 4053272062427790574310,185031225489554592624010] |