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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.

A013919 Numbers n such that sum of first n composites is composite.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 6
6 7
7 8
8 9
9 10
10 11
11 12
12 13
13 15
14 16
15 18
16 19
17 21
18 22
19 23
20 24
21 25
22 26
23 27
24 28
25 29
26 30
27 31
28 32
29 33
30 34
31 38
32 39
33 40
34 41
35 42
36 44
37 45
38 46
39 49
40 50
41 51
42 52
43 55
44 56
45 57
46 58
47 59
48 60
49 61
50 62
51 65
52 66
53 67
54 69
55 70
56 71
57 72
58 76
59 77
60 78
61 79
62 80
63 81
64 82
65 83
66 84
67 85
68 87
69 88
70 89
71 90
72 91
73 92
74 93

List of values

[1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 19, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 38, 39, 40, 41, 42, 44, 45, 46, 49, 50, 51, 52, 55, 56, 57, 58, 59, 60, 61, 62, 65, 66, 67, 69, 70, 71, 72, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 87, 88, 89, 90, 91, 92, 93]

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

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