n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 48 |
4 | 264 |
5 | 1680 |
6 | 11640 |
7 | 86352 |
8 | 673104 |
9 | 5424768 |
10 | 44828400 |
11 | 377810928 |
12 | 3235366752 |
13 | 28074857616 |
14 | 246353214240 |
15 | 2182457514960 |
16 | 19495053028800 |
17 | 175405981214592 |
[0,0,48,264,1680,11640,86352,673104,5424768, 44828400,377810928,3235366752,28074857616, 246353214240,2182457514960,19495053028800, 175405981214592] |