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.

A373437 Integers k such that sigma(sigma(2*k))=2*sigma(sigma(k)); sigma=A000203.

Table of values

n a(n)
1 2
2 6
3 14
4 18
5 38
6 42
7 50
8 54
9 62
10 74
11 86
12 114
13 122
14 126
15 134
16 146
17 150
18 158
19 162
20 186
21 206
22 218
23 222
24 254
25 258
26 266
27 302
28 314
29 326
30 342
31 350
32 366
33 378
34 386
35 398
36 402
37 422
38 434
39 438
40 450
41 458
42 474
43 482
44 518
45 542
46 554
47 558
48 566
49 578
50 602
51 618
52 626
53 654
54 662
55 666
56 674
57 686
58 734
59 746
60 758
61 762
62 774
63 794

List of values

[2, 6, 14, 18, 38, 42, 50, 54, 62, 74, 86, 114, 122, 126, 134, 146, 150, 158, 162, 186, 206, 218, 222, 254, 258, 266, 302, 314, 326, 342, 350, 366, 378, 386, 398, 402, 422, 434, 438, 450, 458, 474, 482, 518, 542, 554, 558, 566, 578, 602, 618, 626, 654, 662, 666, 674, 686, 734, 746, 758, 762, 774, 794]