n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | -3 |
3 | 1 |
4 | 6 |
5 | -1 |
6 | -10 |
7 | 1 |
8 | 15 |
9 | -1 |
10 | -21 |
11 | 1 |
12 | 28 |
13 | -1 |
14 | -36 |
15 | 1 |
16 | 45 |
17 | -1 |
18 | -55 |
19 | 1 |
20 | 66 |
21 | -1 |
22 | -78 |
23 | 1 |
24 | 91 |
25 | -1 |
26 | -105 |
27 | 1 |
28 | 120 |
29 | -1 |
30 | -136 |
31 | 1 |
32 | 153 |
33 | -1 |
34 | -171 |
35 | 1 |
36 | 190 |
37 | -1 |
38 | -210 |
39 | 1 |
40 | 231 |
41 | -1 |
42 | -253 |
43 | 1 |
44 | 276 |
45 | -1 |
46 | -300 |
47 | 1 |
48 | 325 |
49 | -1 |
50 | -351 |
51 | 1 |
52 | 378 |
53 | -1 |
54 | -406 |
55 | 1 |
56 | 435 |
[1,-1,-3,1,6,-1,-10,1,15,-1,-21,1,28,-1,-36,1,45, -1,-55,1,66,-1,-78,1,91,-1,-105,1,120,-1,-136,1, 153,-1,-171,1,190,-1,-210,1,231,-1,-253,1,276,-1, -300,1,325,-1,-351,1,378,-1,-406,1,435] |