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.

A172186 Numbers k such that k, k+1 and 2*k+1 are squarefree.

Table of values

n a(n)
1 1
2 2
3 5
4 6
5 10
6 14
7 21
8 29
9 30
10 33
11 34
12 38
13 41
14 42
15 46
16 57
17 61
18 65
19 66
20 69
21 70
22 77
23 78
24 82
25 86
26 93
27 101
28 102
29 105
30 106
31 109
32 110
33 113
34 114
35 118
36 129
37 133
38 138
39 141
40 142
41 145
42 154
43 158
44 165
45 173
46 177
47 178
48 182
49 185
50 186
51 190
52 194
53 201
54 205
55 209
56 210
57 213
58 214
59 217
60 218

List of values

[1, 2, 5, 6, 10, 14, 21, 29, 30, 33, 34, 38, 41, 42, 46, 57, 61, 65, 66, 69, 70, 77, 78, 82, 86, 93, 101, 102, 105, 106, 109, 110, 113, 114, 118, 129, 133, 138, 141, 142, 145, 154, 158, 165, 173, 177, 178, 182, 185, 186, 190, 194, 201, 205, 209, 210, 213, 214, 217, 218]