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.

A219254 Number of ways to express 2n+1 as p+4q with p, q primes.

Table of values

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

List of values

[0, 0, 0, 0, 0, 1, 1, 2, 1, 2, 1, 2, 3, 2, 1, 4, 2, 2, 2, 3, 2, 2, 2, 2, 4, 4, 1, 4, 4, 3, 3, 3, 3, 3, 3, 4, 4, 5, 0, 5, 7, 3, 3, 6, 3, 5, 3, 5, 4, 6, 2, 3, 6, 2, 5, 6, 3, 5, 5, 4, 6, 6, 3, 5, 7, 3, 4, 8, 3, 5, 5, 3, 4, 7, 3, 6, 6, 5, 5, 8, 4, 3, 8, 4, 5, 8, 1]