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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.

A106747 Replace each odd digit d of n with (d-1)/2 and each even digit d with d/2.

Table of values

n a(n)
0 0
1 0
2 1
3 1
4 2
5 2
6 3
7 3
8 4
9 4
10 0
11 0
12 1
13 1
14 2
15 2
16 3
17 3
18 4
19 4
20 10
21 10
22 11
23 11
24 12
25 12
26 13
27 13
28 14
29 14
30 10
31 10
32 11
33 11
34 12
35 12
36 13
37 13
38 14
39 14
40 20
41 20
42 21
43 21
44 22
45 22
46 23
47 23
48 24
49 24
50 20
51 20
52 21
53 21
54 22
55 22
56 23
57 23
58 24
59 24
60 30
61 30
62 31
63 31
64 32
65 32
66 33
67 33
68 34
69 34
70 30
71 30
72 31
73 31
74 32
75 32

List of values

[0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 30, 30, 31, 31, 32, 32, 33, 33, 34, 34, 30, 30, 31, 31, 32, 32]

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