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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.

A371638 a(n) = 2*n + valuation(n, 3) with valuation(n, 3) = A007949(n).

Table of values

n a(n)
1 2
2 4
3 7
4 8
5 10
6 13
7 14
8 16
9 20
10 20
11 22
12 25
13 26
14 28
15 31
16 32
17 34
18 38
19 38
20 40
21 43
22 44
23 46
24 49
25 50
26 52
27 57
28 56
29 58
30 61
31 62
32 64
33 67
34 68
35 70
36 74
37 74
38 76
39 79
40 80
41 82
42 85
43 86
44 88
45 92
46 92
47 94
48 97
49 98
50 100
51 103
52 104
53 106
54 111
55 110
56 112
57 115
58 116
59 118
60 121
61 122
62 124
63 128
64 128

List of values

[2, 4, 7, 8, 10, 13, 14, 16, 20, 20, 22, 25, 26, 28, 31, 32, 34, 38, 38, 40, 43, 44, 46, 49, 50, 52, 57, 56, 58, 61, 62, 64, 67, 68, 70, 74, 74, 76, 79, 80, 82, 85, 86, 88, 92, 92, 94, 97, 98, 100, 103, 104, 106, 111, 110, 112, 115, 116, 118, 121, 122, 124, 128, 128]

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

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