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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.

A309120 a(n) is the least k > 1 such that n*k is adjacent to a prime.

Table of values

n a(n)
1 2
2 2
3 2
4 2
5 2
6 2
7 2
8 2
9 2
10 2
11 2
12 2
13 4
14 2
15 2
16 2
17 4
18 2
19 2
20 2
21 2
22 2
23 2
24 2
25 4
26 2
27 2
28 3
29 2
30 2
31 2
32 3
33 2
34 2
35 2
36 2
37 2
38 3
39 2
40 2
41 2
42 2
43 4
44 2
45 2
46 3
47 6
48 2
49 2
50 2
51 2
52 2
53 2
54 2
55 2
56 2
57 2
58 3
59 6
60 3
61 6
62 5
63 2
64 2
65 2
66 2
67 4
68 2
69 2
70 2
71 4
72 5
73 4
74 2
75 2
76 2
77 4
78 2
79 2
80 3
81 2
82 2
83 2
84 2
85 6
86 2
87 2
88 3
89 2
90 2
91 2
92 3
93 4
94 3

List of values

[2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 4, 2, 2, 3, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 4, 2, 2, 3, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 6, 3, 6, 5, 2, 2, 2, 2, 4, 2, 2, 2, 4, 5, 4, 2, 2, 2, 4, 2, 2, 3, 2, 2, 2, 2, 6, 2, 2, 3, 2, 2, 2, 3, 4, 3]

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