n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 16 |
5 | 200 |
6 | 2320 |
7 | 26460 |
8 | 303968 |
9 | 3557904 |
10 | 42676320 |
11 | 526076100 |
12 | 6673368240 |
13 | 87148818328 |
14 | 1171554274800 |
15 | 16206294360620 |
16 | 230561544221120 |
17 | 3371256518888480 |
18 | 50628767109223872 |
19 | 780358333403627796 |
[0,0,0,1,16,200,2320,26460,303968,3557904, 42676320,526076100,6673368240,87148818328, 1171554274800,16206294360620,230561544221120, 3371256518888480,50628767109223872, 780358333403627796] |