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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.

A199238 n mod (number of ones in binary representation of n).

Table of values

n a(n)
1 0
2 0
3 1
4 0
5 1
6 0
7 1
8 0
9 1
10 0
11 2
12 0
13 1
14 2
15 3
16 0
17 1
18 0
19 1
20 0
21 0
22 1
23 3
24 0
25 1
26 2
27 3
28 1
29 1
30 2
31 1
32 0
33 1
34 0
35 2
36 0
37 1
38 2
39 3
40 0
41 2
42 0
43 3
44 2
45 1
46 2
47 2
48 0
49 1
50 2
51 3
52 1
53 1
54 2
55 0
56 2
57 1
58 2
59 4
60 0
61 1
62 2
63 3
64 0
65 1
66 0
67 1
68 0
69 0
70 1
71 3
72 0
73 1
74 2
75 3
76 1
77 1
78 2
79 4
80 0
81 0
82 1
83 3
84 0
85 1
86 2

List of values

[0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 2, 0, 1, 2, 3, 0, 1, 0, 1, 0, 0, 1, 3, 0, 1, 2, 3, 1, 1, 2, 1, 0, 1, 0, 2, 0, 1, 2, 3, 0, 2, 0, 3, 2, 1, 2, 2, 0, 1, 2, 3, 1, 1, 2, 0, 2, 1, 2, 4, 0, 1, 2, 3, 0, 1, 0, 1, 0, 0, 1, 3, 0, 1, 2, 3, 1, 1, 2, 4, 0, 0, 1, 3, 0, 1, 2]