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.

A083245 Difference between numbers of related and numbers of unrelated numbers belonging to n: a(n) = A073757(n)-A045763(n) = (n-u(n))-u(n) = n-2*A045763(n) = 2*A073757(n)-n.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 4
7 7
8 6
9 7
10 4
11 11
12 6
13 13
14 4
15 7
16 8
17 17
18 4
19 19
20 6
21 9
22 4
23 23
24 6
25 19
26 4
27 15
28 6
29 29
30 0
31 31
32 10
33 13
34 4
35 19
36 4
37 37
38 4
39 15
40 6
41 41
42 -4
43 43
44 6
45 13
46 4
47 47
48 2
49 39
50 0
51 19
52 6
53 53
54 -4
55 31
56 6
57 21
58 4
59 59
60 -6
61 61
62 4
63 19
64 12
65 37
66 -12
67 67
68 6
69 25
70 -8
71 71
72 -2
73 73
74 4
75 15
76 6
77 49
78 -16
79 79
80 2
81 35
82 4
83 83
84 -14
85 49
86 4
87 31
88 6
89 89
90 -20
91 59
92 6
93 33
94 4
95 55
96 -10
97 97
98 -4

List of values

[1, 2, 3, 4, 5, 4, 7, 6, 7, 4, 11, 6, 13, 4, 7, 8, 17, 4, 19, 6, 9, 4, 23, 6, 19, 4, 15, 6, 29, 0, 31, 10, 13, 4, 19, 4, 37, 4, 15, 6, 41, -4, 43, 6, 13, 4, 47, 2, 39, 0, 19, 6, 53, -4, 31, 6, 21, 4, 59, -6, 61, 4, 19, 12, 37, -12, 67, 6, 25, -8, 71, -2, 73, 4, 15, 6, 49, -16, 79, 2, 35, 4, 83, -14, 49, 4, 31, 6, 89, -20, 59, 6, 33, 4, 55, -10, 97, -4]