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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.

A211005 Pair (i, j) where i = number of adjacent nonprimes and j = number of adjacent primes.

Table of values

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

List of values

[1, 2, 1, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 5, 1, 1, 1, 5, 1, 3, 1, 1, 1, 3, 1, 5, 1, 5, 1, 1, 1, 5, 1, 3, 1, 1, 1, 5, 1, 3, 1, 5, 1, 7, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 13, 1, 3, 1, 5, 1, 1, 1, 9, 1, 1, 1, 5, 1, 5, 1, 3, 1, 5, 1, 5, 1, 1, 1, 9, 1, 1, 1]