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.

A093891 Numbers k such that every prime up to sigma(k) is a sum of divisors of k.

Table of values

n a(n)
1 1
2 2
3 4
4 6
5 8
6 10
7 12
8 16
9 18
10 20
11 24
12 28
13 30
14 32
15 36
16 40
17 42
18 48
19 54
20 56
21 60
22 64
23 66
24 70
25 72
26 78
27 80
28 84
29 88
30 90
31 96
32 100
33 104
34 108
35 112
36 120
37 126
38 128
39 132
40 140
41 144
42 150
43 156
44 160
45 162
46 168
47 176
48 180
49 192
50 196
51 198
52 200
53 204
54 208
55 210
56 216
57 220
58 224
59 228
60 234
61 240

List of values

[1, 2, 4, 6, 8, 10, 12, 16, 18, 20, 24, 28, 30, 32, 36, 40, 42, 48, 54, 56, 60, 64, 66, 70, 72, 78, 80, 84, 88, 90, 96, 100, 104, 108, 112, 120, 126, 128, 132, 140, 144, 150, 156, 160, 162, 168, 176, 180, 192, 196, 198, 200, 204, 208, 210, 216, 220, 224, 228, 234, 240]

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

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