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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.

A124143 Perfect powers pp such that sigma(k) = pp for some positive integer k.

Table of values

n a(n)
1 4
2 8
3 32
4 36
5 121
6 128
7 144
8 216
9 256
10 324
11 400
12 512
13 576
14 784
15 900
16 961
17 1024
18 1296
19 1600
20 1728
21 1764
22 1936
23 2304
24 2704
25 2744
26 2916
27 3136
28 3600
29 3844
30 4096
31 4356
32 4624
33 4900
34 5184
35 5776
36 5832
37 6084
38 6400
39 7056
40 7744
41 7776
42 8000
43 8100
44 8192
45 9216
46 9604

List of values

[4, 8, 32, 36, 121, 128, 144, 216, 256, 324, 400, 512, 576, 784, 900, 961, 1024, 1296, 1600, 1728, 1764, 1936, 2304, 2704, 2744, 2916, 3136, 3600, 3844, 4096, 4356, 4624, 4900, 5184, 5776, 5832, 6084, 6400, 7056, 7744, 7776, 8000, 8100, 8192, 9216, 9604]

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

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