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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.

A175392 a(n) is the smallest positive integer that, when written in binary, occurs in binary A154809(n) but not in binary A030101(A154809(n)).

Table of values

n a(n)
1 2
2 2
3 2
4 2
5 10
6 11
7 2
8 6
9 2
10 2
11 18
12 19
13 4
14 11
15 11
16 2
17 6
18 6
19 2
20 6
21 2
22 2
23 34
24 35
25 18
26 18
27 19
28 19
29 4
30 10
31 42
32 11
33 4
34 11
35 11
36 2
37 6
38 6
39 4
40 6
41 22
42 23
43 2
44 6
45 6
46 14
47 2
48 6
49 2
50 2
51 66
52 67
53 34
54 34
55 35
56 35
57 8
58 18
59 11
60 19
61 13
62 19
63 19
64 4
65 10
66 10
67 10
68 4
69 11
70 11
71 4
72 11
73 10
74 91

List of values

[2, 2, 2, 2, 10, 11, 2, 6, 2, 2, 18, 19, 4, 11, 11, 2, 6, 6, 2, 6, 2, 2, 34, 35, 18, 18, 19, 19, 4, 10, 42, 11, 4, 11, 11, 2, 6, 6, 4, 6, 22, 23, 2, 6, 6, 14, 2, 6, 2, 2, 66, 67, 34, 34, 35, 35, 8, 18, 11, 19, 13, 19, 19, 4, 10, 10, 10, 4, 11, 11, 4, 11, 10, 91]

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