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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.

A102885 Index of n in the primes A000040 or nonprimes A141468.

Table of values

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

List of values

[1, 2, 1, 2, 3, 3, 4, 4, 5, 6, 7, 5, 8, 6, 9, 10, 11, 7, 12, 8, 13, 14, 15, 9, 16, 17, 18, 19, 20, 10, 21, 11, 22, 23, 24, 25, 26, 12, 27, 28, 29, 13, 30, 14, 31, 32, 33, 15, 34, 35, 36, 37, 38, 16, 39, 40, 41, 42, 43, 17, 44, 18, 45, 46, 47, 48, 49, 19, 50, 51, 52, 20, 53, 21, 54]

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