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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.

A291708 Number of partitions of n into two prime parts or two nonprime parts.

Table of values

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

List of values

[0, 1, 0, 1, 2, 1, 2, 2, 2, 4, 1, 3, 3, 4, 3, 6, 2, 6, 4, 6, 4, 8, 3, 9, 5, 9, 4, 9, 5, 11, 7, 9, 7, 13, 6, 15, 7, 10, 9, 14, 8, 16, 10, 14, 10, 16, 9, 19, 11, 18, 10, 17, 11, 21, 13, 18, 12, 20, 13, 25, 15, 18, 15, 24, 14, 27, 15, 19, 17, 26, 16, 28, 18, 25]

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