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.

A146982 Numbers k such that Product{i=1..k}[sigma_0(i)] / k is an integer.

Table of values

n a(n)
1 1
2 2
3 4
4 6
5 8
6 9
7 12
8 16
9 18
10 20
11 24
12 27
13 30
14 32
15 36
16 40
17 45
18 48
19 50
20 54
21 60
22 64
23 70
24 72
25 75
26 80
27 81
28 84
29 90
30 96
31 100
32 105
33 108
34 112
35 120
36 125
37 126
38 128
39 135
40 140
41 144
42 150
43 160
44 162
45 168
46 175
47 180
48 189
49 192
50 196
51 200
52 210
53 216
54 224
55 225
56 240
57 243
58 245
59 250
60 252
61 256

List of values

[1, 2, 4, 6, 8, 9, 12, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 50, 54, 60, 64, 70, 72, 75, 80, 81, 84, 90, 96, 100, 105, 108, 112, 120, 125, 126, 128, 135, 140, 144, 150, 160, 162, 168, 175, 180, 189, 192, 196, 200, 210, 216, 224, 225, 240, 243, 245, 250, 252, 256]

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

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