n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 3 |
4 | 8 |
5 | 150 |
6 | 84 |
7 | 5040 |
8 | 39808 |
9 | 72576 |
10 | 5598000 |
11 | 19617840 |
12 | 392747904 |
13 | 9837828000 |
14 | 23366133504 |
15 | 2120992080480 |
16 | 23679285857280 |
17 | 236064853301760 |
18 | 13280228754130944 |
19 | 79239777198727680 |
20 | 3793985724604769280 |
21 | 97004042539092541440 |
22 | 781106411330024693760 |
[1,0,2,3,8,150,84,5040,39808,72576,5598000, 19617840,392747904,9837828000,23366133504, 2120992080480,23679285857280,236064853301760, 13280228754130944,79239777198727680, 3793985724604769280,97004042539092541440, 781106411330024693760] |