n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 0 |
5 | 0 |
6 | 360 |
7 | 5040 |
8 | 0 |
9 | 60480 |
10 | 3628800 |
11 | 39916800 |
12 | 19958400 |
13 | 3113510400 |
14 | 130767436800 |
15 | 1318571654400 |
16 | 3487131648000 |
17 | 355687428096000 |
18 | 12813639597158400 |
19 | 126713646259200000 |
20 | 1013709170073600000 |
21 | 85161707377883136000 |
22 | 2819368492175499264000 |
[1,0,0,6,0,0,360,5040,0,60480,3628800,39916800, 19958400,3113510400,130767436800,1318571654400, 3487131648000,355687428096000,12813639597158400, 126713646259200000,1013709170073600000, 85161707377883136000,2819368492175499264000] |