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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.

A297366 Numbers k such that uphi(k) + usigma(k) = uphi(k+1) + usigma(k+1), where uphi is the unitary totient function (A047994) and usigma the sum of unitary divisors (A034448).

Table of values

n a(n)
1 6
2 10
3 12
4 15
5 18
6 22
7 24
8 26
9 28
10 36
11 40
12 46
13 48
14 52
15 58
16 63
17 72
18 80
19 82
20 88
21 96
22 100
23 106
24 108
25 112
26 124
27 136
28 148
29 162
30 166
31 172
32 178
33 192
34 196
35 226
36 232
37 242
38 250
39 262
40 268
41 285
42 288
43 292
44 316
45 346
46 352
47 358
48 382
49 388
50 400
51 432
52 448
53 466
54 478
55 486
56 502

List of values

[6, 10, 12, 15, 18, 22, 24, 26, 28, 36, 40, 46, 48, 52, 58, 63, 72, 80, 82, 88, 96, 100, 106, 108, 112, 124, 136, 148, 162, 166, 172, 178, 192, 196, 226, 232, 242, 250, 262, 268, 285, 288, 292, 316, 346, 352, 358, 382, 388, 400, 432, 448, 466, 478, 486, 502]

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

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