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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.

A336385 Number of k = x*y such that phi(k) = n*(phi(x) + phi(y)).

Table of values

n a(n)
1 2
2 5
3 15
4 14
5 7
6 25
7 7
8 36
9 30
10 26
11 15
12 68
13 2
14 21
15 125
16 78
17 9
18 94
19 7
20 90
21 52
22 33
23 38
24 208
25 15
26 11
27 74
28 69
29 3
30 227
31 2
32 166
33 66
34 33
35 129
36 276
37 2
38 25
39 101
40 228
41 7
42 115
43 8
44 76
45 329
46 47
47 28
48 482
49 19
50 65
51 40
52 50
53 7
54 248
55 99
56 234
57 46
58 34
59 20
60 572
61 2
62 5
63 426
64 356
65 16

List of values

[2, 5, 15, 14, 7, 25, 7, 36, 30, 26, 15, 68, 2, 21, 125, 78, 9, 94, 7, 90, 52, 33, 38, 208, 15, 11, 74, 69, 3, 227, 2, 166, 66, 33, 129, 276, 2, 25, 101, 228, 7, 115, 8, 76, 329, 47, 28, 482, 19, 65, 40, 50, 7, 248, 99, 234, 46, 34, 20, 572, 2, 5, 426, 356, 16]

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

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