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.

A368572 Number of refactorable numbers less than n that do not divide n.

Table of values

n a(n)
1 0
2 0
3 1
4 0
5 1
6 0
7 1
8 0
9 2
10 2
11 3
12 2
13 4
14 3
15 4
16 2
17 4
18 2
19 5
20 4
21 5
22 4
23 5
24 2
25 6
26 5
27 5
28 5
29 6
30 5
31 6
32 4
33 6
34 5
35 6
36 2
37 7
38 6
39 7
40 5
41 8
42 7
43 8
44 7
45 7
46 7
47 8
48 4
49 8
50 7
51 8
52 7
53 8
54 5
55 8
56 6
57 9
58 8
59 9
60 7
61 10
62 9
63 9
64 8
65 10
66 9
67 10
68 9
69 10
70 9
71 10
72 3
73 11
74 10
75 11
76 10
77 11
78 10
79 11
80 8
81 11
82 11
83 12
84 10

List of values

[0, 0, 1, 0, 1, 0, 1, 0, 2, 2, 3, 2, 4, 3, 4, 2, 4, 2, 5, 4, 5, 4, 5, 2, 6, 5, 5, 5, 6, 5, 6, 4, 6, 5, 6, 2, 7, 6, 7, 5, 8, 7, 8, 7, 7, 7, 8, 4, 8, 7, 8, 7, 8, 5, 8, 6, 9, 8, 9, 7, 10, 9, 9, 8, 10, 9, 10, 9, 10, 9, 10, 3, 11, 10, 11, 10, 11, 10, 11, 8, 11, 11, 12, 10]

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

Content is available under The OEIS End-User License Agreement.