n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -3 |
3 | 9 |
4 | -24 |
5 | 60 |
6 | -84 |
7 | -756 |
8 | 13104 |
9 | -157248 |
10 | 1795248 |
11 | -20900880 |
12 | 254007936 |
13 | -3250473408 |
14 | 43922668608 |
15 | -626830626240 |
16 | 9437477107968 |
17 | -149644407564288 |
18 | 2493958878657792 |
19 | -43592393744250624 |
20 | 797394015216175104 |
21 | -15230735270523601920 |
[1,0,-3,9,-24,60,-84,-756,13104,-157248,1795248, -20900880,254007936,-3250473408,43922668608, -626830626240,9437477107968,-149644407564288, 2493958878657792,-43592393744250624, 797394015216175104,-15230735270523601920] |