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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.

A093893 Numbers n such that every sum of two or more divisors is composite.

Table of values

n a(n)
1 1
2 3
3 5
4 7
5 11
6 13
7 17
8 19
9 23
10 29
11 31
12 37
13 41
14 43
15 47
16 49
17 53
18 59
19 61
20 67
21 71
22 73
23 79
24 83
25 87
26 89
27 91
28 97
29 101
30 103
31 107
32 109
33 113
34 121
35 127
36 131
37 133
38 137
39 139
40 149
41 151
42 157
43 163
44 167
45 169
46 173
47 179
48 181
49 183
50 191
51 193
52 197
53 199
54 211
55 213
56 217
57 223
58 227
59 229
60 233

List of values

[1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 49, 53, 59, 61, 67, 71, 73, 79, 83, 87, 89, 91, 97, 101, 103, 107, 109, 113, 121, 127, 131, 133, 137, 139, 149, 151, 157, 163, 167, 169, 173, 179, 181, 183, 191, 193, 197, 199, 211, 213, 217, 223, 227, 229, 233]

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

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