n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | -1 |
3 | -3 |
4 | 9 |
5 | 25 |
6 | -145 |
7 | -539 |
8 | 3857 |
9 | 30129 |
10 | -192673 |
11 | -2816979 |
12 | 17218201 |
13 | 364417417 |
14 | -2297788337 |
15 | -63429766763 |
16 | 417350455329 |
17 | 14529736975457 |
18 | -99514205291841 |
19 | -4252720982041379 |
20 | 30285000226110761 |
[1,1,-1,-3,9,25,-145,-539,3857,30129,-192673, -2816979,17218201,364417417,-2297788337, -63429766763,417350455329,14529736975457, -99514205291841,-4252720982041379, 30285000226110761] |