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.

A345221 Number of divisors of n with an even sum of divisors.

Table of values

n a(n)
1 0
2 0
3 1
4 0
5 1
6 2
7 1
8 0
9 1
10 2
11 1
12 3
13 1
14 2
15 3
16 0
17 1
18 2
19 1
20 3
21 3
22 2
23 1
24 4
25 1
26 2
27 2
28 3
29 1
30 6
31 1
32 0
33 3
34 2
35 3
36 3
37 1
38 2
39 3
40 4
41 1
42 6
43 1
44 3
45 4
46 2
47 1
48 5
49 1
50 2
51 3
52 3
53 1
54 4
55 3
56 4
57 3
58 2
59 1
60 9
61 1
62 2
63 4
64 0
65 3
66 6
67 1
68 3
69 3
70 6
71 1
72 4
73 1
74 2
75 4
76 3
77 3
78 6
79 1
80 5
81 2
82 2
83 1
84 9
85 3
86 2
87 3
88 4
89 1
90 8
91 3
92 3

List of values

[0, 0, 1, 0, 1, 2, 1, 0, 1, 2, 1, 3, 1, 2, 3, 0, 1, 2, 1, 3, 3, 2, 1, 4, 1, 2, 2, 3, 1, 6, 1, 0, 3, 2, 3, 3, 1, 2, 3, 4, 1, 6, 1, 3, 4, 2, 1, 5, 1, 2, 3, 3, 1, 4, 3, 4, 3, 2, 1, 9, 1, 2, 4, 0, 3, 6, 1, 3, 3, 6, 1, 4, 1, 2, 4, 3, 3, 6, 1, 5, 2, 2, 1, 9, 3, 2, 3, 4, 1, 8, 3, 3]