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.

A318441 a(n) = Sum_{d|n} [moebius(n/d) > 0]*A033879(d).

Table of values

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

List of values

[1, 1, 2, 1, 4, 1, 6, 1, 5, 3, 10, -3, 12, 5, 7, 1, 16, -1, 18, -1, 11, 9, 22, -11, 19, 11, 14, 1, 28, -5, 30, 1, 19, 15, 23, -19, 36, 17, 23, -9, 40, -3, 42, 5, 14, 21, 46, -27, 41, 11, 31, 7, 52, -7, 39, -7, 35, 27, 58, -45, 60, 29, 24, 1, 47, 1, 66, 11, 43, 7, 70, -55, 72, 35, 30, 13, 59, 3, 78, -25, 41, 39, 82, -51, 63, 41, 55, -3, 88]