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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.

A260626 a(n) = gcd(m, 2^m-1) where m is the n-th nonprime positive integer.

Table of values

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

List of values

[1, 1, 3, 1, 1, 1, 3, 1, 1, 1, 9, 5, 7, 1, 3, 1, 1, 1, 1, 3, 1, 1, 1, 1, 9, 1, 1, 5, 21, 1, 1, 1, 3, 1, 1, 1, 1, 27, 1, 1, 1, 1, 15, 1, 7, 1, 1, 3, 1, 1, 1, 9, 1, 1, 1, 1, 3, 5, 1, 1, 21, 1, 1, 1, 1, 9, 1, 1, 1, 1, 1, 3, 1, 1, 25, 3, 1, 7, 1, 27, 11, 1, 1, 3, 1]