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.

A013920 Composite numbers k such that the sum of all composites <= k is composite.

Table of values

n a(n)
1 4
2 6
3 8
4 9
5 12
6 14
7 15
8 16
9 18
10 20
11 21
12 22
13 25
14 26
15 28
16 30
17 33
18 34
19 35
20 36
21 38
22 39
23 40
24 42
25 44
26 45
27 46
28 48
29 49
30 50
31 55
32 56
33 57
34 58
35 60
36 63
37 64
38 65
39 69
40 70
41 72
42 74
43 77
44 78
45 80
46 81
47 82
48 84
49 85
50 86
51 90
52 91
53 92
54 94
55 95
56 96
57 98
58 104
59 105
60 106
61 108
62 110
63 111
64 112
65 114
66 115
67 116
68 118
69 119

List of values

[4, 6, 8, 9, 12, 14, 15, 16, 18, 20, 21, 22, 25, 26, 28, 30, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 55, 56, 57, 58, 60, 63, 64, 65, 69, 70, 72, 74, 77, 78, 80, 81, 82, 84, 85, 86, 90, 91, 92, 94, 95, 96, 98, 104, 105, 106, 108, 110, 111, 112, 114, 115, 116, 118, 119]

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

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