n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | 2 |
3 | -3 |
4 | 0 |
5 | 30 |
6 | -240 |
7 | 1470 |
8 | -6720 |
9 | 12600 |
10 | 226800 |
11 | -4296600 |
12 | 48787200 |
13 | -407206800 |
14 | 1816214400 |
15 | 19347728400 |
16 | -691775884800 |
17 | 12223324713600 |
18 | -155222158291200 |
19 | 1206712825718400 |
20 | 6182374444646400 |
21 | -501335892869011200 |
22 | 12800637574960435200 |
23 | -226664355546012384000 |
24 | 2645964108636142694400 |
[1,-1,2,-3,0,30,-240,1470,-6720,12600,226800, -4296600,48787200,-407206800,1816214400, 19347728400,-691775884800,12223324713600, -155222158291200,1206712825718400, 6182374444646400,-501335892869011200, 12800637574960435200,-226664355546012384000, 2645964108636142694400] |