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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.

A237840 a(n) = |{0 < k <= n: the number of twin prime pairs not exceeding k*n is a square}|.

Table of values

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

List of values

[1, 2, 2, 1, 3, 3, 2, 1, 1, 2, 1, 2, 2, 1, 2, 1, 1, 2, 1, 2, 3, 1, 3, 4, 3, 4, 4, 3, 3, 4, 2, 2, 4, 2, 3, 2, 1, 3, 2, 2, 2, 1, 2, 1, 2, 2, 2, 4, 3, 2, 2, 1, 3, 4, 3, 1, 3, 1, 2, 4, 2, 5, 2, 3, 2, 3, 1, 3, 2, 4, 4, 1, 3, 2, 4, 2, 4, 4, 4, 4]

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