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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.

A379413 a(n) = n + floor(n*r/t) + floor(n*s/t), where r = e^(1/4), s = e^(1/2), t = e^(3/4).

Table of values

n a(n)
1 1
2 4
3 6
4 9
5 11
6 13
7 16
8 18
9 21
10 23
11 25
12 28
13 30
14 32
15 35
16 37
17 40
18 42
19 44
20 47
21 49
22 52
23 53
24 56
25 59
26 61
27 64
28 65
29 68
30 71
31 73
32 75
33 78
34 80
35 83
36 85
37 87
38 90
39 92
40 95
41 96
42 99
43 102
44 104
45 107
46 108
47 111
48 114
49 116
50 118
51 120
52 123
53 126
54 128
55 130
56 132
57 135
58 138
59 139
60 142
61 144

List of values

[1, 4, 6, 9, 11, 13, 16, 18, 21, 23, 25, 28, 30, 32, 35, 37, 40, 42, 44, 47, 49, 52, 53, 56, 59, 61, 64, 65, 68, 71, 73, 75, 78, 80, 83, 85, 87, 90, 92, 95, 96, 99, 102, 104, 107, 108, 111, 114, 116, 118, 120, 123, 126, 128, 130, 132, 135, 138, 139, 142, 144]