n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 5 |
4 | 50 |
5 | 850 |
6 | 22100 |
7 | 817700 |
8 | 40885000 |
9 | 2657525000 |
10 | 217917050000 |
11 | 22009622050000 |
12 | 2685173890100000 |
13 | 389350214064500000 |
14 | 66189536390965000000 |
15 | 13039338669020105000000 |
16 | 2946890539198543730000000 |
17 | 757350868574025738610000000 |
18 | 219631751886467464196900000000 |
[1,1,5,50,850,22100,817700,40885000,2657525000, 217917050000,22009622050000,2685173890100000, 389350214064500000,66189536390965000000, 13039338669020105000000,2946890539198543730000000, 757350868574025738610000000, 219631751886467464196900000000] |