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.

A320858 a(n) = A320857(prime(n)).

Table of values

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

List of values

[0, -1, 0, 1, 0, 1, 0, -1, 0, 1, 2, 3, 2, 1, 2, 3, 2, 3, 2, 3, 2, 3, 2, 1, 0, 1, 2, 1, 2, 1, 2, 1, 0, -1, 0, 1, 2, 1, 2, 3, 2, 3, 4, 3, 4, 5, 4, 5, 4, 5, 4, 5, 4, 3, 2, 3, 4, 5, 6, 5, 4, 5, 4, 5, 4, 5, 4, 3, 2, 3, 2, 3, 4, 5, 4, 5, 6, 7, 6, 5, 4, 5, 6, 5, 6, 5, 4]