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.

A348711 Integers sorted by decreasing value of sigma(x)/x^2, where sigma is the sum of divisors.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 6
6 5
7 8
8 12
9 10
10 7
11 9
12 14
13 16
14 18
15 15
16 20
17 24
18 11
19 13
20 30
21 22
22 21
23 28
24 36
25 17
26 26
27 32
28 40
29 19
30 27
31 42
32 48
33 25
34 34
35 60
36 23
37 33
38 44
39 38
40 54
41 35
42 45
43 56
44 72
45 50
46 39
47 52
48 29
49 46
50 31
51 66
52 84
53 64
54 70
55 80
56 90
57 37
58 51
59 78
60 96
61 68
62 58
63 63
64 120
65 41
66 62
67 57
68 76
69 108
70 55

List of values

[1, 2, 3, 4, 6, 5, 8, 12, 10, 7, 9, 14, 16, 18, 15, 20, 24, 11, 13, 30, 22, 21, 28, 36, 17, 26, 32, 40, 19, 27, 42, 48, 25, 34, 60, 23, 33, 44, 38, 54, 35, 45, 56, 72, 50, 39, 52, 29, 46, 31, 66, 84, 64, 70, 80, 90, 37, 51, 78, 96, 68, 58, 63, 120, 41, 62, 57, 76, 108, 55]

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

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