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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.

A358178 a(n) is the cardinality of the set of distinct pairwise gcd's of {1! + 1, ..., n! + 1}.

Table of values

n a(n)
1 0
2 1
3 1
4 1
5 1
6 2
7 2
8 2
9 3
10 4
11 4
12 4
13 4
14 4
15 4
16 5
17 6
18 8
19 8
20 8
21 8
22 8
23 8
24 8
25 8
26 8
27 8
28 9
29 9
30 9
31 9
32 9
33 10
34 10
35 11
36 12
37 12
38 12
39 13
40 14
41 14
42 15
43 15
44 15
45 15
46 16
47 16
48 16
49 16
50 16
51 17
52 17
53 17
54 17
55 17
56 17
57 17
58 17
59 17
60 17
61 17
62 17
63 17
64 17
65 17
66 17
67 17
68 17
69 17
70 17
71 17
72 17
73 17
74 17
75 18
76 18
77 18
78 18
79 18
80 18
81 18
82 18
83 18

List of values

[0, 1, 1, 1, 1, 2, 2, 2, 3, 4, 4, 4, 4, 4, 4, 5, 6, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 11, 12, 12, 12, 13, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18]

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