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.

A131902 Smallest positive integer k with the same sum of divisors as the n-th integer for which such a k exists.

Table of values

n a(n)
1 6
2 14
3 10
4 14
5 16
6 20
7 21
8 33
9 24
10 28
11 20
12 30
13 33
14 30
15 34
16 30
17 54
18 40
19 24
20 42
21 44
22 42
23 66
24 30
25 48
26 42
27 60
28 57
29 68
30 44
31 54
32 40
33 60
34 66
35 54
36 52
37 63
38 85
39 102
40 74
41 66
42 104
43 88
44 66
45 80
46 60
47 84
48 99
49 93
50 96
51 86
52 114
53 76
54 132
55 105
56 102
57 60
58 88
59 111
60 90
61 138
62 105
63 114
64 102
65 105
66 138
67 96

List of values

[6, 14, 10, 14, 16, 20, 21, 33, 24, 28, 20, 30, 33, 30, 34, 30, 54, 40, 24, 42, 44, 42, 66, 30, 48, 42, 60, 57, 68, 44, 54, 40, 60, 66, 54, 52, 63, 85, 102, 74, 66, 104, 88, 66, 80, 60, 84, 99, 93, 96, 86, 114, 76, 132, 105, 102, 60, 88, 111, 90, 138, 105, 114, 102, 105, 138, 96]

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

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