cp's OEIS Frontend

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.

A171781 Numbers for which the second bit of the binary expansion is equal to the last bit.

Table of values

n a(n)
1 2
2 3
3 4
4 7
5 8
6 10
7 13
8 15
9 16
10 18
11 20
12 22
13 25
14 27
15 29
16 31
17 32
18 34
19 36
20 38
21 40
22 42
23 44
24 46
25 49
26 51
27 53
28 55
29 57
30 59
31 61
32 63
33 64
34 66
35 68
36 70
37 72
38 74
39 76
40 78
41 80
42 82
43 84
44 86
45 88
46 90
47 92
48 94
49 97
50 99
51 101
52 103
53 105
54 107
55 109
56 111
57 113
58 115
59 117
60 119
61 121
62 123
63 125

List of values

[2, 3, 4, 7, 8, 10, 13, 15, 16, 18, 20, 22, 25, 27, 29, 31, 32, 34, 36, 38, 40, 42, 44, 46, 49, 51, 53, 55, 57, 59, 61, 63, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 97, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125]

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

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