n | a(n) |
---|---|
0 | 0 |
1 | -1 |
2 | 2 |
3 | -4 |
4 | 6 |
5 | -9 |
6 | 12 |
7 | -16 |
8 | 20 |
9 | -25 |
10 | 30 |
11 | -36 |
12 | 42 |
13 | -49 |
14 | 56 |
15 | -64 |
16 | 72 |
17 | -81 |
18 | 90 |
19 | -100 |
20 | 110 |
21 | -121 |
22 | 132 |
23 | -144 |
24 | 156 |
25 | -169 |
26 | 182 |
27 | -196 |
28 | 210 |
29 | -225 |
30 | 240 |
31 | -256 |
32 | 272 |
33 | -289 |
34 | 306 |
35 | -324 |
36 | 342 |
37 | -361 |
38 | 380 |
39 | -400 |
40 | 420 |
41 | -441 |
42 | 462 |
43 | -484 |
44 | 506 |
45 | -529 |
46 | 552 |
47 | -576 |
48 | 600 |
49 | -625 |
50 | 650 |
51 | -676 |
52 | 702 |
[0,-1,2,-4,6,-9,12,-16,20,-25,30,-36,42,-49,56, -64,72,-81,90,-100,110,-121,132,-144,156,-169,182, -196,210,-225,240,-256,272,-289,306,-324,342,-361, 380,-400,420,-441,462,-484,506,-529,552,-576,600, -625,650,-676,702] |