n | a(n) |
---|---|
3 | 1 |
4 | -5 |
5 | 55 |
6 | -385 |
7 | 3311 |
8 | -25585 |
9 | 208335 |
10 | -1652145 |
11 | 13275471 |
12 | -105970865 |
13 | 848699215 |
14 | -6785865905 |
15 | 54301841231 |
16 | -434355079345 |
17 | 3475079247695 |
18 | -27799679551665 |
19 | 222401254176591 |
20 | -1779194762447025 |
21 | 14233619183613775 |
[1,-5,55,-385,3311,-25585,208335,-1652145, 13275471,-105970865,848699215,-6785865905, 54301841231,-434355079345,3475079247695, -27799679551665,222401254176591,-1779194762447025, 14233619183613775] |