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.

A080062 Composite numbers n such that for all primes p dividing n, p-1 divides n-1.

Table of values

n a(n)
1 4
2 8
3 9
4 16
5 25
6 27
7 32
8 45
9 49
10 64
11 81
12 121
13 125
14 128
15 169
16 225
17 243
18 256
19 289
20 325
21 343
22 361
23 405
24 512
25 529
26 561
27 625
28 637
29 729
30 841
31 891
32 961
33 1024
34 1105
35 1125
36 1225
37 1331
38 1369
39 1377
40 1681
41 1729
42 1849
43 2025
44 2048
45 2187
46 2197
47 2209
48 2401
49 2465
50 2809
51 2821

List of values

[4, 8, 9, 16, 25, 27, 32, 45, 49, 64, 81, 121, 125, 128, 169, 225, 243, 256, 289, 325, 343, 361, 405, 512, 529, 561, 625, 637, 729, 841, 891, 961, 1024, 1105, 1125, 1225, 1331, 1369, 1377, 1681, 1729, 1849, 2025, 2048, 2187, 2197, 2209, 2401, 2465, 2809, 2821]

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

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