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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.

A347286 a(n) is n minus the number of odd divisors of n.

Table of values

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

List of values

[0, 1, 1, 3, 3, 4, 5, 7, 6, 8, 9, 10, 11, 12, 11, 15, 15, 15, 17, 18, 17, 20, 21, 22, 22, 24, 23, 26, 27, 26, 29, 31, 29, 32, 31, 33, 35, 36, 35, 38, 39, 38, 41, 42, 39, 44, 45, 46, 46, 47, 47, 50, 51, 50, 51, 54, 53, 56, 57, 56, 59, 60, 57, 63, 61, 62, 65, 66, 65, 66]

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

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