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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.

A356354 a(n) is the least k such that the sets of positions of 1's in the binary expansions of n and k are similar.

Table of values

n a(n)
0 0
1 1
2 1
3 3
4 1
5 3
6 3
7 7
8 1
9 3
10 3
11 11
12 3
13 11
14 7
15 15
16 1
17 3
18 3
19 19
20 3
21 7
22 11
23 23
24 3
25 19
26 11
27 27
28 7
29 23
30 15
31 31
32 1
33 3
34 3
35 35
36 3
37 37
38 19
39 39
40 3
41 37
42 7
43 43
44 11
45 45
46 23
47 47
48 3
49 35
50 19
51 51
52 11
53 43
54 27
55 55
56 7
57 39
58 23
59 55
60 15
61 47
62 31
63 63
64 1
65 3
66 3
67 67
68 3
69 11
70 35
71 71
72 3
73 7

List of values

[0, 1, 1, 3, 1, 3, 3, 7, 1, 3, 3, 11, 3, 11, 7, 15, 1, 3, 3, 19, 3, 7, 11, 23, 3, 19, 11, 27, 7, 23, 15, 31, 1, 3, 3, 35, 3, 37, 19, 39, 3, 37, 7, 43, 11, 45, 23, 47, 3, 35, 19, 51, 11, 43, 27, 55, 7, 39, 23, 55, 15, 47, 31, 63, 1, 3, 3, 67, 3, 11, 35, 71, 3, 7]

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