n | a(n) |
---|---|
2 | 3 |
3 | 6 |
4 | 21 |
5 | 159 |
6 | 1002 |
7 | 5426 |
8 | 32678 |
9 | 213283 |
10 | 1389400 |
11 | 9052394 |
12 | 60114080 |
13 | 406302200 |
14 | 2775970886 |
15 | 19129099772 |
16 | 132872261760 |
[3,6,21,159,1002,5426,32678,213283,1389400, 9052394,60114080,406302200,2775970886,19129099772, 132872261760] |