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.

A067268 Numbers k such that k and k^2+1 have the same number of distinct prime factors.

Table of values

n a(n)
1 2
2 4
3 12
4 15
5 16
6 18
7 22
8 28
9 34
10 35
11 38
12 39
13 44
14 45
15 46
16 48
17 50
18 51
19 52
20 58
21 62
22 65
23 68
24 69
25 76
26 80
27 82
28 85
29 86
30 88
31 92
32 95
33 96
34 100
35 104
36 105
37 106
38 108
39 118
40 132
41 136
42 138
43 141
44 144
45 145
46 152
47 158
48 159
49 164
50 166
51 171
52 174
53 175
54 178
55 188
56 194
57 196
58 201
59 202
60 205

List of values

[2, 4, 12, 15, 16, 18, 22, 28, 34, 35, 38, 39, 44, 45, 46, 48, 50, 51, 52, 58, 62, 65, 68, 69, 76, 80, 82, 85, 86, 88, 92, 95, 96, 100, 104, 105, 106, 108, 118, 132, 136, 138, 141, 144, 145, 152, 158, 159, 164, 166, 171, 174, 175, 178, 188, 194, 196, 201, 202, 205]

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

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