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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.

A281626 a(n) = (sum of trivial divisors of n) - (sum of nontrivial divisors of n).

Table of values

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

List of values

[1, 3, 4, 3, 6, 2, 8, 3, 7, 4, 12, -2, 14, 6, 8, 3, 18, -1, 20, 0, 12, 10, 24, -10, 21, 12, 16, 2, 30, -10, 32, 3, 20, 16, 24, -17, 38, 18, 24, -8, 42, -10, 44, 6, 14, 22, 48, -26, 43, 9, 32, 8, 54, -10, 40, -6, 36, 28, 60, -46, 62, 30, 24, 3, 48, -10, 68, 12]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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