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.

A306670 Numbers k with exactly three distinct prime factors and such that cototient(k) is a square.

Table of values

n a(n)
1 345
2 465
3 468
4 1332
5 1545
6 1833
7 1872
8 2628
9 2737
10 2769
11 3105
12 3145
13 3585
14 3657
15 3945
16 4081
17 4100
18 4185
19 4212
20 4345
21 5328
22 6465
23 6516
24 6785
25 6945
26 7105
27 7488
28 8428
29 8569
30 8625
31 8961
32 10257
33 10512
34 10785
35 10833
36 10945
37 11625
38 11988
39 12132
40 12865

List of values

[345, 465, 468, 1332, 1545, 1833, 1872, 2628, 2737, 2769, 3105, 3145, 3585, 3657, 3945, 4081, 4100, 4185, 4212, 4345, 5328, 6465, 6516, 6785, 6945, 7105, 7488, 8428, 8569, 8625, 8961, 10257, 10512, 10785, 10833, 10945, 11625, 11988, 12132, 12865]

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

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