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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.

A001598 Number of terms in {b(1)..b(n)} relatively prime to b(n), where b(n) = A001597(n).

Table of values

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

List of values

[1, 1, 1, 3, 2, 5, 5, 4, 2, 9, 5, 8, 5, 13, 12, 8, 5, 17, 8, 6, 11, 14, 11, 23, 7, 23, 26, 11, 16, 14, 15, 31, 10, 28, 16, 24, 15, 37, 9, 39, 16, 20, 27, 20, 31, 14, 43, 47, 23, 32, 20, 51, 17, 14, 54, 24, 30, 28, 27, 40, 57, 61, 20, 56, 26, 42, 30, 28, 68, 22]

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

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