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.

A161989 Numbers having more than 2 or fewer than 2 ones in their binary representation.

Table of values

n a(n)
1 0
2 1
3 2
4 4
5 7
6 8
7 11
8 13
9 14
10 15
11 16
12 19
13 21
14 22
15 23
16 25
17 26
18 27
19 28
20 29
21 30
22 31
23 32
24 35
25 37
26 38
27 39
28 41
29 42
30 43
31 44
32 45
33 46
34 47
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 64
51 67
52 69
53 70
54 71
55 73
56 74
57 75
58 76
59 77
60 78
61 79
62 81
63 82
64 83
65 84
66 85
67 86
68 87
69 88
70 89
71 90

List of values

[0, 1, 2, 4, 7, 8, 11, 13, 14, 15, 16, 19, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32, 35, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 67, 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90]

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

Content is available under The OEIS End-User License Agreement.