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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.

A177692 The even values of PrimePi(.), with repetition.

Table of values

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

List of values

[0, 2, 2, 4, 4, 4, 4, 6, 6, 6, 6, 8, 8, 8, 8, 10, 10, 12, 12, 12, 12, 14, 14, 14, 14, 16, 16, 16, 16, 16, 16, 18, 18, 18, 18, 18, 18, 20, 20, 22, 22, 22, 22, 24, 24, 24, 24, 24, 24, 24, 24, 26, 26, 28, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 32, 32, 32, 32, 32]

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

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