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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.

A225518 Number of ways to express 2n+1 as p + 8*q, with p and q primes.

Table of values

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

List of values

[0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 2, 2, 1, 1, 2, 1, 1, 1, 2, 2, 3, 0, 1, 3, 1, 2, 3, 2, 3, 1, 2, 3, 2, 1, 2, 3, 1, 1, 3, 2, 3, 1, 2, 3, 3, 2, 4, 2, 2, 2, 4, 2, 3, 3, 2, 4, 3, 2, 4, 3, 3, 4, 2, 2, 3, 2, 2, 4, 3, 2, 5, 3, 2, 4, 5, 3, 4, 2, 4, 5, 4, 2, 4, 3]

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