n | a(n) |
---|---|
1 | -1 |
2 | 1 |
3 | 1 |
4 | -5 |
5 | 5 |
6 | 21 |
7 | -105 |
8 | 141 |
9 | 777 |
10 | -5513 |
11 | 13209 |
12 | 39821 |
13 | -527525 |
14 | 2257425 |
15 | -41511 |
16 | -70561285 |
17 | 531862173 |
18 | -1559180499 |
19 | -8858267353 |
20 | 147780183829 |
21 | -936560917615 |
22 | 1352130196615 |
23 | 38710924110081 |
24 | -487251979381019 |
25 | 2846575686392251 |
26 | 872653153712201 |
[-1,1,1,-5,5,21,-105,141,777,-5513,13209,39821, -527525,2257425,-41511,-70561285,531862173, -1559180499,-8858267353,147780183829, -936560917615,1352130196615,38710924110081, -487251979381019,2846575686392251,872653153712201] |