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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.

A249856 Let z = A084937: a(n) = number of odd numbers <= z(n) that are != z(k) for k=1..n-1 and not coprime to z(n-1) and z(n-2).

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
10 0
11 0
12 1
13 1
14 0
15 1
16 1
17 1
18 0
19 2
20 0
21 0
22 0
23 0
24 0
25 1
26 0
27 1
28 2
29 0
30 2
31 3
32 0
33 0
34 2
35 0
36 1
37 2
38 0
39 0
40 1
41 0
42 0
43 1
44 0
45 1
46 1
47 0
48 1
49 0
50 0
51 0
52 0
53 0
54 0
55 0
56 0
57 1
58 1
59 0
60 2
61 4
62 0
63 2
64 3
65 0
66 0
67 4
68 0
69 0
70 2
71 0
72 0
73 2
74 0
75 0
76 1
77 0
78 0
79 1
80 0
81 0
82 0
83 0
84 0
85 0
86 0

List of values

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 2, 0, 0, 0, 0, 0, 1, 0, 1, 2, 0, 2, 3, 0, 0, 2, 0, 1, 2, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 2, 4, 0, 2, 3, 0, 0, 4, 0, 0, 2, 0, 0, 2, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0]

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