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.

A215461 Number of decompositions of 2n into ordered sums of one prime and one nonprime.

Table of values

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

List of values

[0, 0, 2, 2, 2, 0, 4, 4, 2, 4, 6, 4, 4, 6, 8, 6, 12, 6, 4, 16, 10, 8, 14, 12, 8, 12, 16, 10, 18, 16, 8, 24, 14, 10, 28, 16, 14, 22, 20, 12, 26, 24, 12, 26, 28, 10, 30, 28, 18, 36, 24, 18, 32, 30, 22, 32, 28, 18, 34, 36, 10, 44, 38, 18, 48, 32, 26, 40, 42, 32, 38, 36, 22, 44]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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