n | a(n) |
---|---|
-1 | 1 |
0 | -4 |
1 | 14 |
2 | -36 |
3 | 85 |
4 | -180 |
5 | 360 |
6 | -684 |
7 | 1246 |
8 | -2196 |
9 | 3754 |
10 | -6264 |
11 | 10226 |
12 | -16380 |
13 | 25804 |
14 | -40032 |
15 | 61275 |
16 | -92628 |
17 | 138452 |
18 | -204804 |
19 | 300040 |
20 | -435672 |
21 | 627356 |
22 | -896400 |
23 | 1271525 |
24 | -1791324 |
25 | 2507426 |
26 | -3488472 |
27 | 4825531 |
28 | -6638688 |
29 | 9085888 |
30 | -12373992 |
[1,-4,14,-36,85,-180,360,-684,1246,-2196,3754, -6264,10226,-16380,25804,-40032,61275,-92628, 138452,-204804,300040,-435672,627356,-896400, 1271525,-1791324,2507426,-3488472,4825531, -6638688,9085888,-12373992] |