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.

A023886 Average of proper divisors excluding 1 is an integer.

Table of values

n a(n)
1 4
2 8
3 9
4 15
5 18
6 21
7 25
8 27
9 33
10 35
11 39
12 45
13 49
14 51
15 55
16 57
17 63
18 65
19 69
20 75
21 77
22 81
23 85
24 87
25 91
26 93
27 95
28 98
29 99
30 111
31 115
32 117
33 119
34 121
35 123
36 125
37 128
38 129
39 133
40 141
41 143
42 145
43 147
44 153
45 155
46 159
47 161
48 162
49 169
50 171
51 175
52 177
53 183
54 185
55 187
56 201
57 203

List of values

[4, 8, 9, 15, 18, 21, 25, 27, 33, 35, 39, 45, 49, 51, 55, 57, 63, 65, 69, 75, 77, 81, 85, 87, 91, 93, 95, 98, 99, 111, 115, 117, 119, 121, 123, 125, 128, 129, 133, 141, 143, 145, 147, 153, 155, 159, 161, 162, 169, 171, 175, 177, 183, 185, 187, 201, 203]