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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.

A092588 Numbers k such that sigma(phi(k)) - phi(sigma(k)) is nonzero and divisible by sigma(k), that is A065395(k)/A000203(k) is a nonzero integer.

Table of values

n a(n)
1 7
2 327
3 463
4 497
5 617
6 691
7 751
8 1207
9 1633
10 2451
11 2643
12 3143
13 3337
14 3503
15 4939
16 5609
17 7093
18 7597
19 10327
20 14987
21 20427
22 21103
23 22345
24 22481
25 24739
26 26491
27 27193
28 28077
29 37753
30 37915
31 42711
32 42717
33 47647
34 48043
35 49243
36 50071
37 51727
38 54823
39 57478

List of values

[7, 327, 463, 497, 617, 691, 751, 1207, 1633, 2451, 2643, 3143, 3337, 3503, 4939, 5609, 7093, 7597, 10327, 14987, 20427, 21103, 22345, 22481, 24739, 26491, 27193, 28077, 37753, 37915, 42711, 42717, 47647, 48043, 49243, 50071, 51727, 54823, 57478]

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

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