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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.

A105285 Indices of Lucas 3-step numbers A001644 which have a nontrivial divisor in common with index.

Table of values

n a(n)
1 6
2 15
3 18
4 21
5 35
6 39
7 44
8 45
9 54
10 55
11 57
12 78
13 80
14 84
15 90
16 93
17 96
18 117
19 120
20 123
21 132
22 133
23 135
24 140
25 147
26 154
27 156
28 162
29 171
30 174
31 195
32 201
33 210
34 213
35 234
36 235
37 240
38 245
39 247
40 249
41 252
42 259
43 264
44 273
45 275
46 279
47 286
48 288
49 290
50 291
51 295
52 299
53 312
54 318
55 323
56 327

List of values

[6, 15, 18, 21, 35, 39, 44, 45, 54, 55, 57, 78, 80, 84, 90, 93, 96, 117, 120, 123, 132, 133, 135, 140, 147, 154, 156, 162, 171, 174, 195, 201, 210, 213, 234, 235, 240, 245, 247, 249, 252, 259, 264, 273, 275, 279, 286, 288, 290, 291, 295, 299, 312, 318, 323, 327]