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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.

A367002 a(n) is the smallest prime factor of n*2^n-1.

Table of values

n a(n)
2 7
3 23
4 3
5 3
6 383
7 5
8 23
9 17
10 3
11 3
12 23
13 5
14 5
15 7
16 3
17 3
18 79
19 13
20 1879
21 13
22 3
23 3
24 47
25 7
26 229
27 5
28 3
29 3
30 32212254719
31 263
32 223
33 5
34 3
35 3
36 5
37 73
38 17
39 1217
40 3
41 3
42 6709
43 29
44 7
45 71
46 3
47 3
48 11
49 97
50 47
51 228713
52 3
53 3
54 5
55 37
56 5
57 7
58 3
59 3
60 9377
61 11
62 13
63 479
64 3
65 3
66 41
67 5
68 13
69 137

List of values

[7, 23, 3, 3, 383, 5, 23, 17, 3, 3, 23, 5, 5, 7, 3, 3, 79, 13, 1879, 13, 3, 3, 47, 7, 229, 5, 3, 3, 32212254719, 263, 223, 5, 3, 3, 5, 73, 17, 1217, 3, 3, 6709, 29, 7, 71, 3, 3, 11, 97, 47, 228713, 3, 3, 5, 37, 5, 7, 3, 3, 9377, 11, 13, 479, 3, 3, 41, 5, 13, 137]