cp's OEIS Frontend

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.

A072451 Number of odd terms in the reduced residue system of 2*n-1.

Table of values

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

List of values

[1, 1, 2, 3, 3, 5, 6, 4, 8, 9, 6, 11, 10, 9, 14, 15, 10, 12, 18, 12, 20, 21, 12, 23, 21, 16, 26, 20, 18, 29, 30, 18, 24, 33, 22, 35, 36, 20, 30, 39, 27, 41, 32, 28, 44, 36, 30, 36, 48, 30, 50, 51, 24, 53, 54, 36, 56, 44, 36, 48, 55, 40, 50, 63, 42, 65, 54, 36, 68, 69, 46, 60, 56]

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

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