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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.

A098189 Sum of unitary divisors minus Euler phi: a(n) = A034448(n) - A000010(n).

Table of values

n a(n)
1 0
2 2
3 2
4 3
5 2
6 10
7 2
8 5
9 4
10 14
11 2
12 16
13 2
14 18
15 16
16 9
17 2
18 24
19 2
20 22
21 20
22 26
23 2
24 28
25 6
26 30
27 10
28 28
29 2
30 64
31 2
32 17
33 28
34 38
35 24
36 38
37 2
38 42
39 32
40 38
41 2
42 84
43 2
44 40
45 36
46 50
47 2
48 52
49 8
50 58
51 40
52 46
53 2
54 66
55 32
56 48
57 44
58 62
59 2
60 104
61 2
62 66
63 44
64 33
65 36
66 124
67 2
68 58
69 52
70 120
71 2
72 66
73 2
74 78
75 64
76 64
77 36
78 144
79 2

List of values

[0, 2, 2, 3, 2, 10, 2, 5, 4, 14, 2, 16, 2, 18, 16, 9, 2, 24, 2, 22, 20, 26, 2, 28, 6, 30, 10, 28, 2, 64, 2, 17, 28, 38, 24, 38, 2, 42, 32, 38, 2, 84, 2, 40, 36, 50, 2, 52, 8, 58, 40, 46, 2, 66, 32, 48, 44, 62, 2, 104, 2, 66, 44, 33, 36, 124, 2, 58, 52, 120, 2, 66, 2, 78, 64, 64, 36, 144, 2]

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