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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.

A338363 a(n) = n + pi(n) - pi(floor(n/2)), where pi = A000720.

Table of values

n a(n)
1 1
2 3
3 5
4 5
5 7
6 7
7 9
8 10
9 11
10 11
11 13
12 14
13 16
14 16
15 17
16 18
17 20
18 21
19 23
20 24
21 25
22 25
23 27
24 28
25 29
26 29
27 30
28 31
29 33
30 34
31 36
32 37
33 38
34 38
35 39
36 40
37 42
38 42
39 43
40 44
41 46
42 47
43 49
44 50
45 51
46 51
47 53
48 54
49 55
50 56
51 57
52 58
53 60
54 61
55 62
56 63
57 64
58 64
59 66
60 67
61 69
62 69
63 70
64 71
65 72
66 73
67 75
68 76
69 77
70 78
71 80
72 81

List of values

[1, 3, 5, 5, 7, 7, 9, 10, 11, 11, 13, 14, 16, 16, 17, 18, 20, 21, 23, 24, 25, 25, 27, 28, 29, 29, 30, 31, 33, 34, 36, 37, 38, 38, 39, 40, 42, 42, 43, 44, 46, 47, 49, 50, 51, 51, 53, 54, 55, 56, 57, 58, 60, 61, 62, 63, 64, 64, 66, 67, 69, 69, 70, 71, 72, 73, 75, 76, 77, 78, 80, 81]

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

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