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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.

A372472 Number of zeros in the binary expansion of the n-th squarefree number.

Table of values

n a(n)
1 0
2 1
3 0
4 1
5 1
6 0
7 2
8 1
9 1
10 1
11 0
12 3
13 2
14 2
15 2
16 1
17 2
18 1
19 1
20 0
21 4
22 4
23 3
24 3
25 3
26 2
27 3
28 3
29 2
30 2
31 1
32 2
33 2
34 1
35 2
36 2
37 1
38 1
39 1
40 5
41 5
42 4
43 4
44 4
45 3
46 4
47 4
48 3
49 3
50 2
51 4
52 3
53 3
54 3
55 2
56 3
57 2
58 2
59 2
60 1
61 4
62 3
63 3
64 2
65 3
66 3
67 2
68 2
69 2
70 1
71 3
72 3
73 2
74 2
75 1
76 2
77 1
78 0
79 6
80 6
81 5
82 5
83 5
84 5
85 5
86 4
87 4

List of values

[0, 1, 0, 1, 1, 0, 2, 1, 1, 1, 0, 3, 2, 2, 2, 1, 2, 1, 1, 0, 4, 4, 3, 3, 3, 2, 3, 3, 2, 2, 1, 2, 2, 1, 2, 2, 1, 1, 1, 5, 5, 4, 4, 4, 3, 4, 4, 3, 3, 2, 4, 3, 3, 3, 2, 3, 2, 2, 2, 1, 4, 3, 3, 2, 3, 3, 2, 2, 2, 1, 3, 3, 2, 2, 1, 2, 1, 0, 6, 6, 5, 5, 5, 5, 5, 4, 4]

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