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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.

A133466 Positive integers k for which there is exactly one integer i in {1,2,3,...,k-1} such that i*k is a square.

Table of values

n a(n)
1 4
2 8
3 12
4 20
5 24
6 28
7 40
8 44
9 52
10 56
11 60
12 68
13 76
14 84
15 88
16 92
17 104
18 116
19 120
20 124
21 132
22 136
23 140
24 148
25 152
26 156
27 164
28 168
29 172
30 184
31 188
32 204
33 212
34 220
35 228
36 232
37 236
38 244
39 248
40 260
41 264
42 268
43 276
44 280
45 284
46 292
47 296
48 308
49 312
50 316
51 328
52 332
53 340
54 344
55 348
56 356

List of values

[4, 8, 12, 20, 24, 28, 40, 44, 52, 56, 60, 68, 76, 84, 88, 92, 104, 116, 120, 124, 132, 136, 140, 148, 152, 156, 164, 168, 172, 184, 188, 204, 212, 220, 228, 232, 236, 244, 248, 260, 264, 268, 276, 280, 284, 292, 296, 308, 312, 316, 328, 332, 340, 344, 348, 356]

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

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