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.

A143519 Moebius transform of A010051, the characteristic function of the primes: a(n) = Sum_{d|n} mu(n/d)*A010051(d); A054525 * A010051.

Table of values

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

List of values

[0, 1, 1, -1, 1, -2, 1, 0, -1, -2, 1, 1, 1, -2, -2, 0, 1, 1, 1, 1, -2, -2, 1, 0, -1, -2, 0, 1, 1, 3, 1, 0, -2, -2, -2, 0, 1, -2, -2, 0, 1, 3, 1, 1, 1, -2, 1, 0, -1, 1, -2, 1, 1, 0, -2, 0, -2, -2, 1, -1, 1, -2, 1, 0, -2, 3, 1, 1, -2, 3, 1, 0, 1, -2, 1, 1, -2, 3, 1, 0, 0, -2, 1, -1, -2, -2, -2, 0, 1]