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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.

A082954 Numbers k such that phi(k*sigma(k)) = phi(k)^2.

Table of values

n a(n)
1 1
2 3
3 39
4 111
5 175
6 183
7 219
8 333
9 459
10 471
11 549
12 579
13 657
14 831
15 939
16 969
17 1191
18 1263
19 1371
20 1413
21 1443
22 1623
23 1737
24 1839
25 1983
26 2019
27 2199
28 2271
29 2379
30 2493
31 2631
32 2817
33 2847
34 2907
35 2991
36 3279
37 3459
38 3573
39 3603
40 3639
41 3711
42 3789
43 3963
44 4113
45 4131
46 4143

List of values

[1, 3, 39, 111, 175, 183, 219, 333, 459, 471, 549, 579, 657, 831, 939, 969, 1191, 1263, 1371, 1413, 1443, 1623, 1737, 1839, 1983, 2019, 2199, 2271, 2379, 2493, 2631, 2817, 2847, 2907, 2991, 3279, 3459, 3573, 3603, 3639, 3711, 3789, 3963, 4113, 4131, 4143]

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

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