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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.

A193231 Blue code for n: in binary coding of a polynomial over GF(2), substitute x+1 for x (see Comments for precise definition).

Table of values

n a(n)
0 0
1 1
2 3
3 2
4 5
5 4
6 6
7 7
8 15
9 14
10 12
11 13
12 10
13 11
14 9
15 8
16 17
17 16
18 18
19 19
20 20
21 21
22 23
23 22
24 30
25 31
26 29
27 28
28 27
29 26
30 24
31 25
32 51
33 50
34 48
35 49
36 54
37 55
38 53
39 52
40 60
41 61
42 63
43 62
44 57
45 56
46 58
47 59
48 34
49 35
50 33
51 32
52 39
53 38
54 36
55 37
56 45
57 44
58 46
59 47
60 40
61 41
62 43
63 42
64 85
65 84
66 86

List of values

[0, 1, 3, 2, 5, 4, 6, 7, 15, 14, 12, 13, 10, 11, 9, 8, 17, 16, 18, 19, 20, 21, 23, 22, 30, 31, 29, 28, 27, 26, 24, 25, 51, 50, 48, 49, 54, 55, 53, 52, 60, 61, 63, 62, 57, 56, 58, 59, 34, 35, 33, 32, 39, 38, 36, 37, 45, 44, 46, 47, 40, 41, 43, 42, 85, 84, 86]

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