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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.

A117677 a(n) = number of divisors of n^2 (excluding 1 and n^2).

Table of values

n a(n)
1 0
2 1
3 1
4 3
5 1
6 7
7 1
8 5
9 3
10 7
11 1
12 13
13 1
14 7
15 7
16 7
17 1
18 13
19 1
20 13
21 7
22 7
23 1
24 19
25 3
26 7
27 5
28 13
29 1
30 25
31 1
32 9
33 7
34 7
35 7
36 23
37 1
38 7
39 7
40 19
41 1
42 25
43 1
44 13
45 13
46 7
47 1
48 25
49 3
50 13
51 7
52 13
53 1
54 19
55 7
56 19
57 7
58 7
59 1
60 43
61 1
62 7
63 13
64 11
65 7
66 25
67 1
68 13
69 7
70 25
71 1
72 33
73 1
74 7
75 13
76 13
77 7
78 25
79 1
80 25
81 7
82 7
83 1
84 43
85 7
86 7
87 7
88 19
89 1
90 43
91 7

List of values

[0, 1, 1, 3, 1, 7, 1, 5, 3, 7, 1, 13, 1, 7, 7, 7, 1, 13, 1, 13, 7, 7, 1, 19, 3, 7, 5, 13, 1, 25, 1, 9, 7, 7, 7, 23, 1, 7, 7, 19, 1, 25, 1, 13, 13, 7, 1, 25, 3, 13, 7, 13, 1, 19, 7, 19, 7, 7, 1, 43, 1, 7, 13, 11, 7, 25, 1, 13, 7, 25, 1, 33, 1, 7, 13, 13, 7, 25, 1, 25, 7, 7, 1, 43, 7, 7, 7, 19, 1, 43, 7]

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

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