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.

A065299 Numbers k such that sigma(k)*phi(k) is squarefree.

Table of values

n a(n)
1 1
2 2
3 4
4 9
5 121
6 242
7 529
8 1058
9 2209
10 3481
11 4418
12 5041
13 6889
14 6962
15 10082
16 11449
17 13778
18 17161
19 22898
20 27889
21 32041
22 34322
23 51529
24 55778
25 57121
26 64082
27 96721
28 103058
29 114242
30 120409
31 128881
32 146689
33 175561
34 185761
35 193442
36 196249
37 218089

List of values

[1, 2, 4, 9, 121, 242, 529, 1058, 2209, 3481, 4418, 5041, 6889, 6962, 10082, 11449, 13778, 17161, 22898, 27889, 32041, 34322, 51529, 55778, 57121, 64082, 96721, 103058, 114242, 120409, 128881, 146689, 175561, 185761, 193442, 196249, 218089]