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.

A280892 Squareful numbers with both neighbors squarefree.

Table of values

n a(n)
1 4
2 12
3 16
4 18
5 20
6 32
7 36
8 40
9 52
10 54
11 56
12 60
13 68
14 72
15 84
16 88
17 90
18 92
19 96
20 104
21 108
22 112
23 128
24 132
25 140
26 144
27 150
28 156
29 160
30 162
31 164
32 180
33 184
34 192
35 196
36 198
37 200
38 204
39 212
40 216
41 220
42 228
43 232
44 234
45 236
46 240
47 248
48 250
49 252
50 256
51 264
52 268
53 270
54 272
55 284
56 292
57 294
58 300
59 304
60 306
61 308
62 312

List of values

[4, 12, 16, 18, 20, 32, 36, 40, 52, 54, 56, 60, 68, 72, 84, 88, 90, 92, 96, 104, 108, 112, 128, 132, 140, 144, 150, 156, 160, 162, 164, 180, 184, 192, 196, 198, 200, 204, 212, 216, 220, 228, 232, 234, 236, 240, 248, 250, 252, 256, 264, 268, 270, 272, 284, 292, 294, 300, 304, 306, 308, 312]

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

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