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.

A020475 a(n) is the number of k for which binomial(n,k) is divisible by n.

Table of values

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

List of values

[0, 2, 1, 2, 2, 4, 2, 6, 4, 6, 6, 10, 5, 12, 6, 8, 8, 16, 10, 18, 10, 14, 14, 22, 10, 20, 18, 18, 14, 28, 11, 30, 16, 26, 30, 26, 22, 36, 30, 30, 22, 40, 20, 42, 26, 26, 30, 46, 20, 42, 34, 32, 34, 52, 26, 46, 33, 50, 42, 58, 26, 60, 30, 46, 32, 50, 48, 66, 58, 50, 44, 70, 40, 72, 66, 46, 58]

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

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