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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.

A187831 Smallest number m > n such that n occurs in Collatz trajectory starting with m; a(0) = 1 by convention.

Table of values

n a(n)
0 1
1 2
2 3
3 6
4 5
5 6
6 12
7 9
8 9
9 18
10 11
11 14
12 24
13 14
14 18
15 30
16 17
17 18
18 36
19 25
20 22
21 42
22 25
23 27
24 48
25 33
26 28
27 54
28 36
29 33
30 60
31 41
32 42
33 66
34 36
35 41
36 72
37 43
38 39
39 78
40 41
41 54
42 84
43 57
44 50
45 90
46 47
47 54
48 96
49 57
50 66
51 102
52 56
53 54
54 108
55 73
56 57
57 114
58 59
59 78
60 120
61 62
62 82
63 126
64 75

List of values

[1, 2, 3, 6, 5, 6, 12, 9, 9, 18, 11, 14, 24, 14, 18, 30, 17, 18, 36, 25, 22, 42, 25, 27, 48, 33, 28, 54, 36, 33, 60, 41, 42, 66, 36, 41, 72, 43, 39, 78, 41, 54, 84, 57, 50, 90, 47, 54, 96, 57, 66, 102, 56, 54, 108, 73, 57, 114, 59, 78, 120, 62, 82, 126, 75]

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

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