cp's OEIS Frontend

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.

A359330 Composite k for which phi(k) + phi(k') = k, where k' is the arithmetic derivative of k (A003415).

Table of values

n a(n)
1 4
2 6
3 8
4 10
5 12
6 18
7 22
8 28
9 34
10 58
11 60
12 72
13 82
14 84
15 88
16 108
17 112
18 118
19 124
20 132
21 140
22 142
23 202
24 204
25 214
26 216
27 220
28 228
29 260
30 274
31 298
32 324
33 340
34 358
35 372
36 382
37 394
38 444
39 454
40 478
41 492
42 508
43 538
44 562
45 564
46 572
47 580
48 620
49 622
50 644
51 694
52 708
53 740
54 804
55 812
56 820

List of values

[4, 6, 8, 10, 12, 18, 22, 28, 34, 58, 60, 72, 82, 84, 88, 108, 112, 118, 124, 132, 140, 142, 202, 204, 214, 216, 220, 228, 260, 274, 298, 324, 340, 358, 372, 382, 394, 444, 454, 478, 492, 508, 538, 562, 564, 572, 580, 620, 622, 644, 694, 708, 740, 804, 812, 820]

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

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