n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 5040 |
8 | 322560 |
9 | 6531840 |
10 | 72576000 |
11 | 548856000 |
12 | 3161410560 |
13 | 14841066240 |
14 | 59364264960 |
15 | 208702494000 |
16 | 659602944000 |
17 | 1906252508160 |
18 | 5104345559040 |
19 | 12796310741760 |
20 | 30287126016000 |
21 | 68146033536000 |
[0,0,0,0,0,0,5040,322560,6531840,72576000, 548856000,3161410560,14841066240,59364264960, 208702494000,659602944000,1906252508160, 5104345559040,12796310741760,30287126016000, 68146033536000] |