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.

A324639 Numbers k such that bitand(2k,sigma(k)) = 2*bitand(k,sigma(k)-k), where bitand is bitwise-AND, A004198.

Table of values

n a(n)
1 1
2 2
3 4
4 5
5 6
6 8
7 9
8 10
9 16
10 17
11 20
12 26
13 28
14 32
15 36
16 37
17 38
18 41
19 44
20 50
21 64
22 73
23 74
24 88
25 98
26 100
27 104
28 128
29 130
30 134
31 136
32 137
33 149
34 152
35 153
36 164
37 172
38 184
39 256
40 257
41 261
42 262
43 264
44 272
45 277
46 284
47 293
48 294
49 304
50 328
51 337
52 368
53 392
54 405
55 410
56 424
57 442
58 464
59 496
60 512
61 520
62 521
63 522
64 528
65 529
66 538
67 548
68 549
69 550
70 556
71 560
72 577

List of values

[1, 2, 4, 5, 6, 8, 9, 10, 16, 17, 20, 26, 28, 32, 36, 37, 38, 41, 44, 50, 64, 73, 74, 88, 98, 100, 104, 128, 130, 134, 136, 137, 149, 152, 153, 164, 172, 184, 256, 257, 261, 262, 264, 272, 277, 284, 293, 294, 304, 328, 337, 368, 392, 405, 410, 424, 442, 464, 496, 512, 520, 521, 522, 528, 529, 538, 548, 549, 550, 556, 560, 577]