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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.

A211376 a(n) is the smallest 5-smooth number k such that both prime(n) - k and prime(n) + k are prime.

Table of values

n a(n)
3 2
4 4
5 6
6 6
7 6
8 12
9 6
10 12
11 12
12 6
13 12
14 24
15 6
16 6
17 12
18 18
19 6
20 12
21 6
22 18
23 24
24 18
25 30
26 12
27 6
28 6
29 30
30 24
31 24
32 18
33 30
34 12
35 18
36 12
37 6
38 36
39 30
40 6
41 12
42 18
43 60
44 30
45 30
46 72
47 12
48 60
49 30
50 48
51 6
52 12
53 30
54 12
55 6
56 6
57 12
58 60
59 6
60 12
61 54
62 24
63 24
64 48
65 36
66 36
67 18
68 30
69 36
70 18
71 6
72 90

List of values

[2, 4, 6, 6, 6, 12, 6, 12, 12, 6, 12, 24, 6, 6, 12, 18, 6, 12, 6, 18, 24, 18, 30, 12, 6, 6, 30, 24, 24, 18, 30, 12, 18, 12, 6, 36, 30, 6, 12, 18, 60, 30, 30, 72, 12, 60, 30, 48, 6, 12, 30, 12, 6, 6, 12, 60, 6, 12, 54, 24, 24, 48, 36, 36, 18, 30, 36, 18, 6, 90]

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

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