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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.

A384543 Number of distinct values from the bitwise operation i XOR j for all integers i and j in the range [1, n].

Table of values

n a(n)
1 1
2 2
3 4
4 7
5 8
6 8
7 8
8 15
9 16
10 16
11 16
12 16
13 16
14 16
15 16
16 31
17 32
18 32
19 32
20 32
21 32
22 32
23 32
24 32
25 32
26 32
27 32
28 32
29 32
30 32
31 32
32 63
33 64
34 64
35 64
36 64
37 64
38 64
39 64
40 64
41 64
42 64
43 64
44 64
45 64
46 64
47 64
48 64
49 64
50 64
51 64
52 64
53 64
54 64
55 64
56 64
57 64
58 64
59 64
60 64
61 64
62 64
63 64
64 127
65 128
66 128

List of values

[1, 2, 4, 7, 8, 8, 8, 15, 16, 16, 16, 16, 16, 16, 16, 31, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 63, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 127, 128, 128]

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

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