cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A117001 Sum_{d|n, sqrt(n) < d <= n} Jacobi(2,d)*d - Sum_{d|n, 1 <= d < sqrt(n)} Jacobi(2,d)*d.

Table of values

n a(n)
1 0
2 -1
3 -4
4 -1
5 -6
6 -4
7 6
8 -1
9 8
10 -6
11 -12
12 2
13 -14
14 6
15 12
16 -1
17 16
18 11
19 -20
20 -6
21 -12
22 -12
23 22
24 2
25 24
26 -14
27 -16
28 6
29 -30
30 22
31 30
32 -1
33 24
34 16
35 -24
36 11
37 -38
38 -20
39 28
40 4
41 40
42 -12
43 -44
44 -12
45 -14
46 22
47 46
48 2
49 48
50 29
51 -32
52 -14
53 -54
54 -16
55 48
56 -8
57 40
58 -30
59 -60
60 22
61 -62
62 30
63 46
64 -1
65 56
66 24
67 -68
68 16
69 -44
70 -38
71 70
72 11
73 72
74 -38
75 -28
76 -20
77 -96
78 28

List of values

[0, -1, -4, -1, -6, -4, 6, -1, 8, -6, -12, 2, -14, 6, 12, -1, 16, 11, -20, -6, -12, -12, 22, 2, 24, -14, -16, 6, -30, 22, 30, -1, 24, 16, -24, 11, -38, -20, 28, 4, 40, -12, -44, -12, -14, 22, 46, 2, 48, 29, -32, -14, -54, -16, 48, -8, 40, -30, -60, 22, -62, 30, 46, -1, 56, 24, -68, 16, -44, -38, 70, 11, 72, -38, -28, -20, -96, 28]