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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.

A162310 The count of lesser-twin-primes smaller than the n-th isolated prime.

Table of values

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

List of values

[0, 4, 5, 6, 6, 7, 8, 8, 8, 8, 10, 10, 10, 12, 12, 12, 12, 15, 15, 16, 17, 17, 17, 18, 19, 19, 20, 20, 20, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 27, 27, 28, 29, 29, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30]

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

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