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.

A290002 Numbers k such that psi(phi(k)) = phi(psi(k)).

Table of values

n a(n)
1 1
2 10
3 18
4 20
5 36
6 40
7 54
8 70
9 72
10 78
11 80
12 108
13 110
14 140
15 144
16 156
17 160
18 162
19 174
20 198
21 216
22 220
23 222
24 230
25 234
26 246
27 280
28 288
29 294
30 312
31 320
32 324
33 348
34 396
35 414
36 426
37 432
38 438
39 440
40 444
41 450
42 460
43 468
44 470
45 486
46 492
47 534
48 560
49 576
50 588
51 594
52 624
53 640
54 648
55 666
56 696
57 702
58 770
59 792
60 828
61 846
62 852

List of values

[1, 10, 18, 20, 36, 40, 54, 70, 72, 78, 80, 108, 110, 140, 144, 156, 160, 162, 174, 198, 216, 220, 222, 230, 234, 246, 280, 288, 294, 312, 320, 324, 348, 396, 414, 426, 432, 438, 440, 444, 450, 460, 468, 470, 486, 492, 534, 560, 576, 588, 594, 624, 640, 648, 666, 696, 702, 770, 792, 828, 846, 852]

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

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