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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.

A073719 a(n) = floor(prime(2^n)/composite(2^n)).

Table of values

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

List of values

[0, 0, 0, 1, 2, 2, 3, 4, 5, 5, 6, 7, 8, 8, 9, 10, 11, 12, 12, 13, 14, 15, 15, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, 23, 24, 25, 26, 26, 27, 28, 28, 29, 30, 31, 31, 32, 33, 33, 34, 35, 36, 36, 37, 38, 38, 39, 40, 41, 41, 42, 43, 43, 44, 45, 46, 46, 47, 48, 48, 49, 50]

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

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