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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.

A176237 Binary expansion of n contains at least one 1-bit at even position and one 1-bit at odd position.

Table of values

n a(n)
1 3
2 6
3 7
4 9
5 11
6 12
7 13
8 14
9 15
10 18
11 19
12 22
13 23
14 24
15 25
16 26
17 27
18 28
19 29
20 30
21 31
22 33
23 35
24 36
25 37
26 38
27 39
28 41
29 43
30 44
31 45
32 46
33 47
34 48
35 49
36 50
37 51
38 52
39 53
40 54
41 55
42 56
43 57
44 58
45 59
46 60
47 61
48 62
49 63
50 66
51 67
52 70
53 71
54 72
55 73
56 74
57 75
58 76
59 77
60 78
61 79
62 82
63 83
64 86
65 87
66 88
67 89
68 90
69 91
70 92
71 93

List of values

[3, 6, 7, 9, 11, 12, 13, 14, 15, 18, 19, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 35, 36, 37, 38, 39, 41, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 66, 67, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 82, 83, 86, 87, 88, 89, 90, 91, 92, 93]

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

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