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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.

A060668 Numbers k such that phi(x) = k has exactly 5 solutions.

Table of values

n a(n)
1 8
2 20
3 220
4 272
5 300
6 368
7 416
8 456
9 500
10 656
11 732
12 848
13 876
14 1092
15 1160
16 1212
17 1236
18 1328
19 1376
20 1424
21 1568
22 1624
23 1716
24 1808
25 2144
26 2244
27 2336
28 2420
29 2460
30 2480
31 2528
32 2556
33 2768
34 3056
35 3080
36 3252
37 3320
38 3344
39 3536
40 3560
41 3612
42 3728
43 3732
44 3900
45 4016

List of values

[8, 20, 220, 272, 300, 368, 416, 456, 500, 656, 732, 848, 876, 1092, 1160, 1212, 1236, 1328, 1376, 1424, 1568, 1624, 1716, 1808, 2144, 2244, 2336, 2420, 2460, 2480, 2528, 2556, 2768, 3056, 3080, 3252, 3320, 3344, 3536, 3560, 3612, 3728, 3732, 3900, 4016]

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

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