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.

A329821 Largest k for which sigma(k) = A002191(n), where A002191 = range of sigma, the sum-of-divisors function A000203.

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 4
6 7
7 11
8 9
9 13
10 8
11 17
12 19
13 23
14 12
15 29
16 25
17 31
18 22
19 37
20 18
21 27
22 41
23 43
24 47
25 53
26 39
27 49
28 59
29 61
30 32
31 67
32 71
33 73
34 45
35 79
36 83
37 89
38 36
39 50
40 77
41 97
42 101
43 103
44 107
45 109
46 91
47 113
48 95
49 81
50 75
51 82
52 64
53 127
54 131
55 121
56 137
57 139
58 119
59 149
60 151
61 125

List of values

[1, 2, 3, 5, 4, 7, 11, 9, 13, 8, 17, 19, 23, 12, 29, 25, 31, 22, 37, 18, 27, 41, 43, 47, 53, 39, 49, 59, 61, 32, 67, 71, 73, 45, 79, 83, 89, 36, 50, 77, 97, 101, 103, 107, 109, 91, 113, 95, 81, 75, 82, 64, 127, 131, 121, 137, 139, 119, 149, 151, 125]

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

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