n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 720 |
4 | 1 |
5 | 5040 |
6 | 1036800 |
7 | 10080 |
8 | 3628800 |
9 | 24634368000 |
10 | 6350400 |
11 | 747242496000 |
12 | 3476402012160000 |
13 | 105670656000 |
14 | 11298306539520000 |
15 | 1489290622009344000000 |
16 | 2259661307904000 |
17 | 6688268793387417600000 |
18 | 920024174652492349440000000 |
19 | 8655406673795481600000 |
[1,1,1,720,1,5040,1036800,10080,3628800, 24634368000,6350400,747242496000,3476402012160000, 105670656000,11298306539520000, 1489290622009344000000,2259661307904000, 6688268793387417600000, 920024174652492349440000000, 8655406673795481600000] |