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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.

A169818 Rank of n-th prime as defined in A177854.

Table of values

n a(n)
1 0
2 1
3 1
4 1
5 2
6 2
7 1
8 2
9 2
10 2
11 1
12 2
13 2
14 2
15 2
16 2
17 2
18 2
19 2
20 2
21 2
22 2
23 2
24 2
25 2
26 2
27 2
28 2
29 2
30 2
31 1
32 3
33 2
34 2
35 2
36 2
37 3
38 2
39 2
40 3
41 2
42 2
43 2
44 2
45 2
46 2
47 2
48 2
49 3
50 3
51 3
52 2
53 2
54 2
55 1
56 3
57 2
58 2
59 3
60 2
61 3
62 2
63 2
64 2
65 3
66 3
67 3
68 2
69 3
70 2
71 3
72 2
73 3
74 2
75 2
76 2
77 3
78 3
79 2
80 2
81 2
82 2
83 2
84 2
85 3
86 3
87 2
88 3
89 3
90 3
91 3
92 2
93 2
94 2
95 2
96 2
97 2
98 3
99 3

List of values

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

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