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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.

A076486 Solutions to gcd(sigma(x), phi(x)) < gcd(sigma(core(x)), phi(core(x))), i.e., when A009223(x) < A066086(x) or if A066087(x) < 0.

Table of values

n a(n)
1 9
2 25
3 28
4 36
5 45
6 50
7 52
8 75
9 76
10 81
11 84
12 90
13 98
14 100
15 117
16 121
17 124
18 144
19 148
20 150
21 153
22 156
23 175
24 180
25 208
26 225
27 228
28 234
29 242
30 244
31 245
32 252
33 261
34 268
35 275
36 289
37 292
38 300
39 304
40 306
41 316
42 324
43 325
44 333
45 338
46 360
47 364
48 369
49 372
50 380
51 388
52 392
53 400
54 405
55 412

List of values

[9, 25, 28, 36, 45, 50, 52, 75, 76, 81, 84, 90, 98, 100, 117, 121, 124, 144, 148, 150, 153, 156, 175, 180, 208, 225, 228, 234, 242, 244, 245, 252, 261, 268, 275, 289, 292, 300, 304, 306, 316, 324, 325, 333, 338, 360, 364, 369, 372, 380, 388, 392, 400, 405, 412]

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

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