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.

A385195 The number of integers k from 1 to n such that the greatest divisor of k that is a unitary divisor of n is either 1 or 2.

Table of values

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

List of values

[1, 2, 2, 3, 4, 4, 6, 7, 8, 8, 10, 6, 12, 12, 8, 15, 16, 16, 18, 12, 12, 20, 22, 14, 24, 24, 26, 18, 28, 16, 30, 31, 20, 32, 24, 24, 36, 36, 24, 28, 40, 24, 42, 30, 32, 44, 46, 30, 48, 48, 32, 36, 52, 52, 40, 42, 36, 56, 58, 24, 60, 60, 48, 63, 48, 40, 66, 48, 44]