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.

A301867 Numbers n such that phi(n), psi(n) and sigma(n) are simultaneously perfect squares.

Table of values

n a(n)
1 1
2 170
3 679
4 5770
5 9154
6 9809
7 14322
8 22413
9 37114
10 51455
11 82615
12 100821
13 101153
14 115430
15 139954
16 171069
17 198462
18 222893
19 233358
20 270485
21 349894
22 389045
23 391090
24 514294
25 561782
26 595122
27 608685
28 664853
29 701338
30 815538
31 1009527
32 1231230
33 1290993
34 1397091

List of values

[1, 170, 679, 5770, 9154, 9809, 14322, 22413, 37114, 51455, 82615, 100821, 101153, 115430, 139954, 171069, 198462, 222893, 233358, 270485, 349894, 389045, 391090, 514294, 561782, 595122, 608685, 664853, 701338, 815538, 1009527, 1231230, 1290993, 1397091]

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

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