n | a(n) |
---|---|
1 | 1 |
2 | -3 |
3 | -16 |
4 | 60 |
5 | 384 |
6 | -1680 |
7 | -12288 |
8 | 60480 |
9 | 491520 |
10 | -2661120 |
11 | -23592960 |
12 | 138378240 |
13 | 1321205760 |
14 | -8302694400 |
15 | -84557168640 |
16 | 564583219200 |
17 | 6088116142080 |
18 | -42908324659200 |
19 | -487049291366400 |
20 | 3604299271372800 |
[1,-3,-16,60,384,-1680,-12288,60480,491520, -2661120,-23592960,138378240,1321205760, -8302694400,-84557168640,564583219200, 6088116142080,-42908324659200,-487049291366400, 3604299271372800] |