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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.

A346018 Triangle read by rows: T(n,k) is the number of integers m such that 1 <= m <= n and gcd(m,n) <= k, 1 <= k <= n.

Table of values

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

List of values

[1, 1, 2, 2, 2, 3, 2, 3, 3, 4, 4, 4, 4, 4, 5, 2, 4, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 7, 4, 6, 6, 7, 7, 7, 7, 8, 6, 6, 8, 8, 8, 8, 8, 8, 9, 4, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 4, 6, 8, 10, 10, 11, 11, 11, 11, 11, 11, 12]

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