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.

A257218 Lexicographically earliest sequence of distinct positive integers such that gcd(a(n), a(n-1)) takes no value more than twice.

Table of values

n a(n)
1 1
2 2
3 3
4 6
5 4
6 8
7 10
8 5
9 15
10 9
11 18
12 12
13 16
14 24
15 30
16 20
17 40
18 32
19 48
20 36
21 27
22 54
23 72
24 60
25 45
26 75
27 25
28 50
29 70
30 7
31 14
32 28
33 42
34 21
35 63
36 126
37 84
38 56
39 112
40 64
41 96
42 120
43 80
44 100
45 150
46 90
47 108
48 81
49 162
50 216
51 144
52 168
53 140
54 35
55 105
56 210
57 180
58 135
59 225
60 300

List of values

[1, 2, 3, 6, 4, 8, 10, 5, 15, 9, 18, 12, 16, 24, 30, 20, 40, 32, 48, 36, 27, 54, 72, 60, 45, 75, 25, 50, 70, 7, 14, 28, 42, 21, 63, 126, 84, 56, 112, 64, 96, 120, 80, 100, 150, 90, 108, 81, 162, 216, 144, 168, 140, 35, 105, 210, 180, 135, 225, 300]

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

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