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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.

A073140 Sum of the largest and smallest number having in binary representation the same number of 0's and 1's as n.

Table of values

n a(n)
0 0
1 2
2 4
3 6
4 8
5 11
6 11
7 14
8 16
9 21
10 21
11 25
12 21
13 25
14 25
15 30
16 32
17 41
18 41
19 47
20 41
21 47
22 47
23 53
24 41
25 47
26 47
27 53
28 47
29 53
30 53
31 62
32 64
33 81
34 81
35 91
36 81
37 91
38 91
39 99
40 81
41 91
42 91
43 99
44 91
45 99
46 99
47 109
48 81
49 91
50 91
51 99
52 91
53 99
54 99
55 109
56 91
57 99
58 99
59 109
60 99
61 109
62 109
63 126
64 128
65 161
66 161
67 179

List of values

[0, 2, 4, 6, 8, 11, 11, 14, 16, 21, 21, 25, 21, 25, 25, 30, 32, 41, 41, 47, 41, 47, 47, 53, 41, 47, 47, 53, 47, 53, 53, 62, 64, 81, 81, 91, 81, 91, 91, 99, 81, 91, 91, 99, 91, 99, 99, 109, 81, 91, 91, 99, 91, 99, 99, 109, 91, 99, 99, 109, 99, 109, 109, 126, 128, 161, 161, 179]

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

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