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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.

A379054 a(n) = composite(2*n+2) - composite(2*n).

Table of values

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

List of values

[3, 3, 3, 3, 3, 3, 2, 2, 4, 2, 2, 3, 3, 3, 3, 2, 2, 3, 2, 3, 3, 2, 3, 2, 4, 2, 2, 3, 3, 2, 2, 3, 2, 2, 3, 2, 4, 2, 4, 2, 3, 2, 2, 2, 2, 2, 3, 2, 3, 2, 3, 3, 2, 2, 2, 3, 3, 2, 3, 2, 2, 3, 3, 2, 2, 3, 2, 3, 3, 2, 2, 2, 3, 3, 3, 3, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 3, 3, 3]

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