n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | -4 |
3 | 30 |
4 | -336 |
5 | 5040 |
6 | -95040 |
7 | 2162160 |
8 | -57657600 |
9 | 1764322560 |
10 | -60949324800 |
11 | 2346549004800 |
12 | -99638080819200 |
13 | 4626053752320000 |
14 | -233153109116928000 |
15 | 12677700308232960000 |
16 | -739781100339240960000 |
17 | 46113021921146019840000 |
18 | -3058021453718104473600000 |
[1,1,-4,30,-336,5040,-95040,2162160,-57657600, 1764322560,-60949324800,2346549004800, -99638080819200,4626053752320000, -233153109116928000,12677700308232960000, -739781100339240960000,46113021921146019840000, -3058021453718104473600000] |