n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | -2 |
4 | 8 |
5 | -16 |
6 | -112 |
7 | 1968 |
8 | -16896 |
9 | 55680 |
10 | 1243392 |
11 | -32546304 |
12 | 427932672 |
13 | -1824506880 |
14 | -79446663168 |
15 | 2767039739904 |
16 | -48592416374784 |
17 | 243186999164928 |
18 | 17201692341633024 |
19 | -744898387504988160 |
20 | 16285431143888584704 |
21 | -90779807638034841600 |
[1,1,0,-2,8,-16,-112,1968,-16896,55680,1243392, -32546304,427932672,-1824506880,-79446663168, 2767039739904,-48592416374784,243186999164928, 17201692341633024,-744898387504988160, 16285431143888584704,-90779807638034841600] |