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.

A341635 a(n) = Sum_{d|n} phi(d) * mu(d) * mu(n/d).

Table of values

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

List of values

[1, -2, -3, 1, -5, 6, -7, 0, 2, 10, -11, -3, -13, 14, 15, 0, -17, -4, -19, -5, 21, 22, -23, 0, 4, 26, 0, -7, -29, -30, -31, 0, 33, 34, 35, 2, -37, 38, 39, 0, -41, -42, -43, -11, -10, 46, -47, 0, 6, -8, 51, -13, -53, 0, 55, 0, 57, 58, -59, 15, -61, 62, -14, 0, 65]