n | a(n) |
---|---|
1 | 1 |
2 | -1 |
3 | 4 |
4 | -8 |
5 | 128 |
6 | 512 |
7 | -18432 |
8 | 73728 |
9 | -884736 |
10 | -14155776 |
11 | 1415577600 |
12 | 11324620800 |
13 | -1630745395200 |
14 | -58706834227200 |
15 | -3757237390540800 |
16 | 30057899124326400 |
17 | -7694822175827558400 |
18 | -92337866109930700800 |
[1,-1,4,-8,128,512,-18432,73728,-884736,-14155776, 1415577600,11324620800,-1630745395200, -58706834227200,-3757237390540800, 30057899124326400,-7694822175827558400, -92337866109930700800] |