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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.

A086142 a(n) = floor( log( prime(n) )^2 ).

Table of values

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

List of values

[0, 1, 2, 3, 5, 6, 8, 8, 9, 11, 11, 13, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 19, 20, 20, 21, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 25, 25, 26, 26, 26, 27, 27, 27, 27, 28, 28, 29, 29, 29, 29, 29, 30, 30, 30, 31, 31, 31, 31, 31, 31, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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