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.

A382769 Largest k < n such that gcd(k,n) > 1 and rad(k) does not divide n, where rad = A007947, or 0 if k does not exist.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
10 6
11 0
12 10
13 0
14 12
15 12
16 0
17 0
18 15
19 0
20 18
21 18
22 20
23 0
24 22
25 0
26 24
27 0
28 26
29 0
30 28
31 0
32 0
33 30
34 30
35 30
36 34
37 0
38 36
39 36
40 38
41 0
42 40
43 0
44 42
45 42
46 44
47 0
48 46
49 0
50 48
51 48
52 50
53 0
54 52
55 50
56 54
57 54
58 56
59 0
60 58
61 0
62 60
63 60
64 0
65 60
66 63
67 0
68 66
69 66
70 68
71 0
72 70
73 0
74 72

List of values

[0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 10, 0, 12, 12, 0, 0, 15, 0, 18, 18, 20, 0, 22, 0, 24, 0, 26, 0, 28, 0, 0, 30, 30, 30, 34, 0, 36, 36, 38, 0, 40, 0, 42, 42, 44, 0, 46, 0, 48, 48, 50, 0, 52, 50, 54, 54, 56, 0, 58, 0, 60, 60, 0, 60, 63, 0, 66, 66, 68, 0, 70, 0, 72]

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

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