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.

A340190 Möbius transform of A063994(x) = Product_{primes p dividing x} gcd(p-1, x-1).

Table of values

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

List of values

[1, 0, 1, 0, 3, -1, 5, 0, 0, -3, 9, 0, 11, -5, -1, 0, 15, 0, 17, 0, -3, -9, 21, 0, 0, -11, 0, 2, 27, 1, 29, 0, -7, -15, -5, 0, 35, -17, -9, 0, 39, 3, 41, 0, 4, -21, 45, 0, 0, 0, -13, 2, 51, 0, -9, -2, -15, -27, 57, 0, 59, -29, 0, 0, 1, 11, 65, 0, -19, 7, 69, 0, 71, -35, 0, 2, -11, 9, 77, 0, 0, -39, 81, -2, -3, -41, -25]