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.

A087069 a(n) = Sum_{k >= 0} floor(n/(4^k)).

Table of values

n a(n)
0 0
1 1
2 2
3 3
4 5
5 6
6 7
7 8
8 10
9 11
10 12
11 13
12 15
13 16
14 17
15 18
16 21
17 22
18 23
19 24
20 26
21 27
22 28
23 29
24 31
25 32
26 33
27 34
28 36
29 37
30 38
31 39
32 42
33 43
34 44
35 45
36 47
37 48
38 49
39 50
40 52
41 53
42 54
43 55
44 57
45 58
46 59
47 60
48 63
49 64
50 65
51 66
52 68
53 69
54 70
55 71
56 73
57 74
58 75
59 76
60 78
61 79
62 80
63 81
64 85
65 86
66 87
67 88
68 90
69 91
70 92
71 93

List of values

[0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18, 21, 22, 23, 24, 26, 27, 28, 29, 31, 32, 33, 34, 36, 37, 38, 39, 42, 43, 44, 45, 47, 48, 49, 50, 52, 53, 54, 55, 57, 58, 59, 60, 63, 64, 65, 66, 68, 69, 70, 71, 73, 74, 75, 76, 78, 79, 80, 81, 85, 86, 87, 88, 90, 91, 92, 93]