n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | -1 |
3 | 11 |
4 | -30 |
5 | 215 |
6 | -1095 |
7 | 9200 |
8 | -67060 |
9 | 676565 |
10 | -6364125 |
11 | 75816050 |
12 | -870716550 |
13 | 12014125175 |
14 | -162677426275 |
15 | 2556597056000 |
16 | -39838813521000 |
17 | 703292880031625 |
18 | -12389158068197625 |
19 | 242880759376082750 |
[0,2,-1,11,-30,215,-1095,9200,-67060,676565, -6364125,75816050,-870716550,12014125175, -162677426275,2556597056000,-39838813521000, 703292880031625,-12389158068197625, 242880759376082750] |