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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.

A070824 Number of divisors of n which are > 1 and < n (nontrivial divisors).

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 0
6 2
7 0
8 2
9 1
10 2
11 0
12 4
13 0
14 2
15 2
16 3
17 0
18 4
19 0
20 4
21 2
22 2
23 0
24 6
25 1
26 2
27 2
28 4
29 0
30 6
31 0
32 4
33 2
34 2
35 2
36 7
37 0
38 2
39 2
40 6
41 0
42 6
43 0
44 4
45 4
46 2
47 0
48 8
49 1
50 4
51 2
52 4
53 0
54 6
55 2
56 6
57 2
58 2
59 0
60 10
61 0
62 2
63 4
64 5
65 2
66 6
67 0
68 4
69 2
70 6
71 0
72 10
73 0
74 2
75 4
76 4
77 2
78 6
79 0
80 8
81 3
82 2
83 0
84 10
85 2
86 2

List of values

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

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

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