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.

A111905 Numbers k such that more primes, among primes <= the largest prime dividing k, divide k than do not.

Table of values

n a(n)
1 2
2 4
3 6
4 8
5 10
6 12
7 15
8 16
9 18
10 20
11 24
12 30
13 32
14 36
15 40
16 42
17 45
18 48
19 50
20 54
21 60
22 64
23 66
24 70
25 72
26 75
27 80
28 84
29 90
30 96
31 100
32 105
33 108
34 110
35 120
36 126
37 128
38 132
39 135
40 140
41 144
42 150
43 154
44 160
45 162
46 165
47 168
48 180
49 192
50 198
51 200
52 210
53 216
54 220
55 225
56 231
57 240
58 250
59 252
60 256
61 264

List of values

[2, 4, 6, 8, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 42, 45, 48, 50, 54, 60, 64, 66, 70, 72, 75, 80, 84, 90, 96, 100, 105, 108, 110, 120, 126, 128, 132, 135, 140, 144, 150, 154, 160, 162, 165, 168, 180, 192, 198, 200, 210, 216, 220, 225, 231, 240, 250, 252, 256, 264]

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

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