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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.

A281016 Numbers k such that k, phi(k) and cototient(k) are all perfect powers.

Table of values

n a(n)
1 8
2 16
3 32
4 64
5 125
6 128
7 256
8 512
9 1024
10 2048
11 3125
12 4096
13 4913
14 8192
15 16384
16 32768
17 50653
18 65536
19 78125
20 131072
21 262144
22 524288
23 1030301
24 1048576
25 1419857
26 1953125
27 2097152
28 4194304
29 7645373
30 8388608
31 16777216
32 16974593
33 33554432
34 35831808
35 48828125
36 64481201
37 67108864
38 69343957

List of values

[8, 16, 32, 64, 125, 128, 256, 512, 1024, 2048, 3125, 4096, 4913, 8192, 16384, 32768, 50653, 65536, 78125, 131072, 262144, 524288, 1030301, 1048576, 1419857, 1953125, 2097152, 4194304, 7645373, 8388608, 16777216, 16974593, 33554432, 35831808, 48828125, 64481201, 67108864, 69343957]

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

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