n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 30 |
3 | 540 |
4 | 8400 |
5 | 126000 |
6 | 1905120 |
7 | 29635200 |
8 | 479001600 |
9 | 8083152000 |
10 | 142702560000 |
11 | 2637143308800 |
12 | 50999300352000 |
13 | 1031319184896000 |
14 | 21785854970880000 |
15 | 480178027929600000 |
16 | 11029155770400768000 |
[0,1,30,540,8400,126000,1905120,29635200, 479001600,8083152000,142702560000,2637143308800, 50999300352000,1031319184896000,21785854970880000, 480178027929600000,11029155770400768000] |