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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.

A336530 Number of triples of divisors d_i < d_j < d_k of n such that gcd(d_i, d_j, d_k) > 1.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 1
9 0
10 0
11 0
12 5
13 0
14 0
15 0
16 4
17 0
18 5
19 0
20 5
21 0
22 0
23 0
24 23
25 0
26 0
27 1
28 5
29 0
30 12
31 0
32 10
33 0
34 0
35 0
36 36
37 0
38 0
39 0
40 23
41 0
42 12
43 0
44 5
45 5
46 0
47 0
48 62
49 0
50 5
51 0
52 5
53 0
54 23
55 0
56 23
57 0
58 0
59 0
60 87
61 0
62 0
63 5
64 20
65 0
66 12
67 0
68 5
69 0
70 12
71 0
72 120
73 0
74 0
75 5
76 5
77 0
78 12
79 0
80 62
81 4

List of values

[0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 5, 0, 0, 0, 4, 0, 5, 0, 5, 0, 0, 0, 23, 0, 0, 1, 5, 0, 12, 0, 10, 0, 0, 0, 36, 0, 0, 0, 23, 0, 12, 0, 5, 5, 0, 0, 62, 0, 5, 0, 5, 0, 23, 0, 23, 0, 0, 0, 87, 0, 0, 5, 20, 0, 12, 0, 5, 0, 12, 0, 120, 0, 0, 5, 5, 0, 12, 0, 62, 4]

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