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.

A297170 a(n) = gcd(phi(n), sigma(n)-n).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 1
6 2
7 1
8 1
9 2
10 4
11 1
12 4
13 1
14 2
15 1
16 1
17 1
18 3
19 1
20 2
21 1
22 2
23 1
24 4
25 2
26 4
27 1
28 4
29 1
30 2
31 1
32 1
33 5
34 4
35 1
36 1
37 1
38 2
39 1
40 2
41 1
42 6
43 1
44 20
45 3
46 2
47 1
48 4
49 2
50 1
51 1
52 2
53 1
54 6
55 1
56 8
57 1
58 4
59 1
60 4
61 1
62 2
63 1
64 1
65 1
66 2
67 1
68 2
69 1
70 2
71 1
72 3
73 1
74 4
75 1
76 4
77 1
78 6
79 1
80 2
81 2
82 4
83 1
84 4
85 1
86 2
87 1
88 4
89 1
90 24
91 3
92 4
93 5
94 2
95 1
96 4
97 1
98 1
99 3
100 1
101 1
102 2
103 1
104 2
105 3

List of values

[1, 1, 1, 1, 1, 2, 1, 1, 2, 4, 1, 4, 1, 2, 1, 1, 1, 3, 1, 2, 1, 2, 1, 4, 2, 4, 1, 4, 1, 2, 1, 1, 5, 4, 1, 1, 1, 2, 1, 2, 1, 6, 1, 20, 3, 2, 1, 4, 2, 1, 1, 2, 1, 6, 1, 8, 1, 4, 1, 4, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 1, 3, 1, 4, 1, 4, 1, 6, 1, 2, 2, 4, 1, 4, 1, 2, 1, 4, 1, 24, 3, 4, 5, 2, 1, 4, 1, 1, 3, 1, 1, 2, 1, 2, 3]