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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.

A222711 Numbers k such that gcd(sigma(k), phi(k)) (A009223) attains record values.

Table of values

n a(n)
1 1
2 3
3 12
4 14
5 15
6 35
7 105
8 190
9 248
10 357
11 616
12 812
13 1045
14 3080
15 3135
16 3339
17 4064
18 5049
19 8323
20 8636
21 10659
22 12441
23 16065
24 19780
25 20026
26 23374
27 24871
28 29029
29 50065
30 58435
31 64285
32 87685
33 124355
34 132957
35 137885
36 140335
37 248501
38 263055
39 317205
40 353133
41 423657
42 596037
43 655707
44 734517
45 894387

List of values

[1, 3, 12, 14, 15, 35, 105, 190, 248, 357, 616, 812, 1045, 3080, 3135, 3339, 4064, 5049, 8323, 8636, 10659, 12441, 16065, 19780, 20026, 23374, 24871, 29029, 50065, 58435, 64285, 87685, 124355, 132957, 137885, 140335, 248501, 263055, 317205, 353133, 423657, 596037, 655707, 734517, 894387]

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

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