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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.

A075699 Number of primes in the interval (n,4n].

Table of values

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

List of values

[2, 3, 3, 4, 5, 6, 5, 7, 7, 8, 9, 10, 9, 10, 11, 12, 12, 13, 13, 14, 15, 15, 15, 15, 16, 18, 19, 20, 20, 20, 19, 20, 21, 21, 23, 23, 22, 24, 24, 25, 25, 26, 25, 26, 27, 28, 27, 28, 29, 31, 31, 31, 31, 31, 31, 32, 33, 34, 34, 35, 35, 35, 36, 36, 37, 38, 37, 39, 39, 40, 41, 41, 40]

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

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