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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.

A070046 Number of primes between prime(n) and 2*prime(n) exclusive.

Table of values

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

List of values

[1, 1, 1, 2, 3, 3, 4, 4, 5, 6, 7, 9, 9, 9, 9, 11, 13, 12, 13, 14, 13, 15, 15, 16, 19, 20, 19, 19, 18, 18, 23, 23, 25, 25, 27, 26, 28, 28, 28, 28, 30, 30, 32, 32, 32, 32, 35, 38, 38, 38, 39, 39, 39, 41, 42, 43, 42, 42, 42, 42, 42, 44, 49, 50, 49, 49, 54, 54, 56, 55, 55, 55, 57, 58]

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

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