n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 36 |
4 | 648 |
5 | 19800 |
6 | 972000 |
7 | 69060600 |
8 | 6756825600 |
9 | 866219961600 |
10 | 140837901120000 |
11 | 28269530815680000 |
12 | 6865910948635200000 |
[1,4,36,648,19800,972000,69060600,6756825600, 866219961600,140837901120000,28269530815680000, 6865910948635200000] |