n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 4 |
3 | 40 |
4 | 576 |
5 | 10528 |
6 | 233920 |
7 | 6124032 |
8 | 184656640 |
9 | 6302821888 |
10 | 240245858304 |
11 | 10115537336320 |
12 | 466275700903936 |
13 | 23354247194542080 |
14 | 1262994451308888064 |
15 | 73347095164693676032 |
16 | 4552571878016243466240 |
17 | 300763132329730843475968 |
18 | 21071629550593224017182720 |
[1,0,4,40,576,10528,233920,6124032,184656640, 6302821888,240245858304,10115537336320, 466275700903936,23354247194542080, 1262994451308888064,73347095164693676032, 4552571878016243466240,300763132329730843475968, 21071629550593224017182720] |