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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.

A132345 Number of increasing three-term geometric sequences from the integers {1,2,...,n}.

Table of values

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

List of values

[0, 0, 0, 1, 1, 1, 1, 2, 4, 4, 4, 5, 5, 5, 5, 8, 8, 10, 10, 11, 11, 11, 11, 12, 16, 16, 18, 19, 19, 19, 19, 22, 22, 22, 22, 27, 27, 27, 27, 28, 28, 28, 28, 29, 31, 31, 31, 34, 40, 44, 44, 45, 45, 47, 47, 48, 48, 48, 48, 49, 49, 49, 51, 58, 58, 58, 58, 59, 59, 59, 59, 64, 64, 64, 68]

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