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.

A236747 Number of 0 <= k <= sqrt(n) such that n-k and n+k are both prime.

Table of values

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

List of values

[0, 1, 1, 1, 2, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 2, 0, 1, 1, 1, 2, 1, 1, 1, 0, 2, 1, 0, 1, 0, 0, 2, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 1, 1, 2, 2, 0, 1, 1, 1, 1, 2, 0, 2, 1, 1, 1, 1, 0, 2, 0, 1, 1, 0, 1, 0]