n | a(n) |
---|---|
1 | 1 |
2 | 7 |
3 | 26 |
4 | 50 |
5 | 24 |
6 | -24 |
7 | 48 |
8 | -144 |
9 | 576 |
10 | -2880 |
11 | 17280 |
12 | -120960 |
13 | 967680 |
14 | -8709120 |
15 | 87091200 |
16 | -958003200 |
17 | 11496038400 |
18 | -149448499200 |
19 | 2092278988800 |
20 | -31384184832000 |
21 | 502146957312000 |
22 | -8536498274304000 |
23 | 153656968937472000 |
24 | -2919482409811968000 |
25 | 58389648196239360000 |
[1,7,26,50,24,-24,48,-144,576,-2880,17280,-120960, 967680,-8709120,87091200,-958003200,11496038400, -149448499200,2092278988800,-31384184832000, 502146957312000,-8536498274304000, 153656968937472000,-2919482409811968000, 58389648196239360000] |