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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.

A060715 Number of primes between n and 2n exclusive.

Table of values

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

List of values

[0, 1, 1, 2, 1, 2, 2, 2, 3, 4, 3, 4, 3, 3, 4, 5, 4, 4, 4, 4, 5, 6, 5, 6, 6, 6, 7, 7, 6, 7, 7, 7, 7, 8, 8, 9, 9, 9, 9, 10, 9, 10, 9, 9, 10, 10, 9, 9, 10, 10, 11, 12, 11, 12, 13, 13, 14, 14, 13, 13, 12, 12, 12, 13, 13, 14, 13, 13, 14, 15, 14, 14, 13, 13, 14, 15, 15]

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