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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.

A158276 Numbers k such that sigma_1(k) does not divide sigma_2(k).

Table of values

n a(n)
1 2
2 3
3 5
4 6
5 7
6 8
7 10
8 11
9 12
10 13
11 14
12 15
13 17
14 18
15 19
16 21
17 22
18 23
19 24
20 26
21 27
22 28
23 29
24 30
25 31
26 32
27 33
28 34
29 35
30 37
31 38
32 39
33 40
34 41
35 42
36 43
37 44
38 45
39 46
40 47
41 48
42 51
43 52
44 53
45 54
46 55
47 56
48 57
49 58
50 59
51 60
52 61
53 62
54 63
55 65
56 66
57 67
58 68
59 69
60 70
61 71
62 72
63 73
64 74
65 75
66 76
67 77

List of values

[2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 17, 18, 19, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77]

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

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