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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.

A011371 a(n) = n minus (number of 1's in binary expansion of n). Also highest power of 2 dividing n!.

Table of values

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

List of values

[0, 0, 1, 1, 3, 3, 4, 4, 7, 7, 8, 8, 10, 10, 11, 11, 15, 15, 16, 16, 18, 18, 19, 19, 22, 22, 23, 23, 25, 25, 26, 26, 31, 31, 32, 32, 34, 34, 35, 35, 38, 38, 39, 39, 41, 41, 42, 42, 46, 46, 47, 47, 49, 49, 50, 50, 53, 53, 54, 54, 56, 56, 57, 57, 63, 63, 64, 64, 66, 66, 67, 67, 70]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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