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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.

A092401 List of pairs n, 3n, where n is the least unused number so far.

Table of values

n a(n)
1 1
2 3
3 2
4 6
5 4
6 12
7 5
8 15
9 7
10 21
11 8
12 24
13 9
14 27
15 10
16 30
17 11
18 33
19 13
20 39
21 14
22 42
23 16
24 48
25 17
26 51
27 18
28 54
29 19
30 57
31 20
32 60
33 22
34 66
35 23
36 69
37 25
38 75
39 26
40 78
41 28
42 84
43 29
44 87
45 31
46 93
47 32
48 96
49 34
50 102
51 35
52 105
53 36
54 108
55 37
56 111
57 38
58 114
59 40
60 120
61 41
62 123
63 43
64 129
65 44
66 132
67 45
68 135
69 46

List of values

[1, 3, 2, 6, 4, 12, 5, 15, 7, 21, 8, 24, 9, 27, 10, 30, 11, 33, 13, 39, 14, 42, 16, 48, 17, 51, 18, 54, 19, 57, 20, 60, 22, 66, 23, 69, 25, 75, 26, 78, 28, 84, 29, 87, 31, 93, 32, 96, 34, 102, 35, 105, 36, 108, 37, 111, 38, 114, 40, 120, 41, 123, 43, 129, 44, 132, 45, 135, 46]

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

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