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.

A304661 Numbers n that are log_2(n-1)-smooth, i.e., such that all the prime factors of n are less than log_2(n).

Table of values

n a(n)
1 1
2 8
3 9
4 12
5 16
6 18
7 24
8 27
9 32
10 36
11 40
12 45
13 48
14 50
15 54
16 60
17 64
18 72
19 75
20 80
21 81
22 90
23 96
24 100
25 108
26 120
27 125
28 128
29 135
30 140
31 144
32 147
33 150
34 160
35 162
36 168
37 175
38 180
39 189
40 192
41 196
42 200
43 210
44 216
45 224
46 225
47 240
48 243
49 245
50 250
51 252
52 256
53 270
54 280
55 288
56 294
57 300

List of values

[1, 8, 9, 12, 16, 18, 24, 27, 32, 36, 40, 45, 48, 50, 54, 60, 64, 72, 75, 80, 81, 90, 96, 100, 108, 120, 125, 128, 135, 140, 144, 147, 150, 160, 162, 168, 175, 180, 189, 192, 196, 200, 210, 216, 224, 225, 240, 243, 245, 250, 252, 256, 270, 280, 288, 294, 300]

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

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