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.

A057022 a(n) = floor((sum of divisors of n) / (number of divisors of n)), or floor(sigma_1(n)/sigma_0(n)).

Table of values

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

List of values

[1, 1, 2, 2, 3, 3, 4, 3, 4, 4, 6, 4, 7, 6, 6, 6, 9, 6, 10, 7, 8, 9, 12, 7, 10, 10, 10, 9, 15, 9, 16, 10, 12, 13, 12, 10, 19, 15, 14, 11, 21, 12, 22, 14, 13, 18, 24, 12, 19, 15, 18, 16, 27, 15, 18, 15, 20, 22, 30, 14, 31, 24, 17, 18, 21, 18, 34, 21, 24, 18]

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

Content is available under The OEIS End-User License Agreement.