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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.

A241762 a(n) is the least number k > 0 such that sigma(k/n) = phi(k).

Table of values

n a(n)
1 1
2 2
3 45
4 12
5 70
6 36
7 42
8 336
9 270
10 420
11 1848
12 2520
13 2730
14 5880
15 12600
16 332640
17 353430
18 166320
19 175560
20 1663200
21 2522520
22 87650640
23 118798680
24 1051807680
25 671517000
26 1139458320
27 35231316120
28 15952416480
29 16522145640
30 495664369200
31 563462139240
32 18030788455680
33 37620925622280
34 130723216303680
35 43948907402400

List of values

[1, 2, 45, 12, 70, 36, 42, 336, 270, 420, 1848, 2520, 2730, 5880, 12600, 332640, 353430, 166320, 175560, 1663200, 2522520, 87650640, 118798680, 1051807680, 671517000, 1139458320, 35231316120, 15952416480, 16522145640, 495664369200, 563462139240, 18030788455680, 37620925622280, 130723216303680, 43948907402400]

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

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