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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.

A262406 Squarefree k such that phi(k) is a perfect square.

Table of values

n a(n)
1 1
2 2
3 5
4 10
5 17
6 34
7 37
8 57
9 74
10 85
11 101
12 114
13 170
14 185
15 197
16 202
17 219
18 257
19 273
20 285
21 370
22 394
23 401
24 438
25 451
26 489
27 505
28 514
29 546
30 570
31 577
32 629
33 677
34 679
35 802
36 902
37 969
38 978
39 985
40 1010
41 1057
42 1095
43 1154
44 1258
45 1285
46 1297
47 1354
48 1358
49 1365

List of values

[1, 2, 5, 10, 17, 34, 37, 57, 74, 85, 101, 114, 170, 185, 197, 202, 219, 257, 273, 285, 370, 394, 401, 438, 451, 489, 505, 514, 546, 570, 577, 629, 677, 679, 802, 902, 969, 978, 985, 1010, 1057, 1095, 1154, 1258, 1285, 1297, 1354, 1358, 1365]

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

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