n | a(n) |
---|---|
0 | 2 |
1 | 6 |
2 | 30 |
3 | 90 |
4 | 1530 |
5 | 16830 |
6 | 218790 |
7 | 9407970 |
8 | 2417848290 |
9 | 137817352530 |
10 | 28252557268650 |
11 | 19296496614487950 |
12 | 4650455684091595950 |
13 | 12700394473254148539450 |
14 | 41619192688853844763777650 |
15 | 13775952780010622616810402150 |
16 | 902834617343556174437903325704550 |
[2,6,30,90,1530,16830,218790,9407970,2417848290, 137817352530,28252557268650,19296496614487950, 4650455684091595950,12700394473254148539450, 41619192688853844763777650, 13775952780010622616810402150, 902834617343556174437903325704550] |