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.

A333471 a(n) = 2 * mu(n) + Sum_{d|n, d > 1} mu(n/d) * (prime(d) - prime(d-1)).

Table of values

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

List of values

[2, -1, 0, 1, 2, 1, 2, 0, 2, 3, 0, 3, 2, -1, 0, 4, 4, -2, 4, -3, -2, 5, 2, 0, 4, 1, -2, 1, 0, -3, 12, -2, 4, -3, 4, -4, 4, 1, 0, 2, 4, 1, 8, -5, -2, -1, 10, 2, 0, -8, -2, 1, 0, 10, 2, 2, 0, 1, 4, -1, 0, -3, 10, 0, -4, -7, 12, 3, 6, -9, 2, 4, 6, 1, -2, -3, 2, 3, 2, -2]