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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.

A216782 Numbers such that numerator(sigma(n)/n) is even and denominator(sigma(n)/n) is odd.

Table of values

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

List of values

[3, 5, 6, 7, 11, 13, 14, 15, 17, 19, 21, 22, 23, 27, 28, 29, 30, 31, 33, 35, 37, 38, 39, 41, 42, 43, 45, 46, 47, 51, 53, 54, 55, 57, 59, 60, 61, 62, 63, 65, 66, 67, 69, 70, 71, 73, 75, 77, 78, 79, 83, 84, 85, 86, 87, 89, 91, 92, 93, 94, 95, 97, 99, 101, 102]

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

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