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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.

A006370 The Collatz or 3x+1 map: a(n) = n/2 if n is even, 3n + 1 if n is odd.

Table of values

n a(n)
0 0
1 4
2 1
3 10
4 2
5 16
6 3
7 22
8 4
9 28
10 5
11 34
12 6
13 40
14 7
15 46
16 8
17 52
18 9
19 58
20 10
21 64
22 11
23 70
24 12
25 76
26 13
27 82
28 14
29 88
30 15
31 94
32 16
33 100
34 17
35 106
36 18
37 112
38 19
39 118
40 20
41 124
42 21
43 130
44 22
45 136
46 23
47 142
48 24
49 148
50 25
51 154
52 26
53 160
54 27
55 166
56 28
57 172
58 29
59 178
60 30
61 184
62 31
63 190
64 32
65 196
66 33

List of values

[0, 4, 1, 10, 2, 16, 3, 22, 4, 28, 5, 34, 6, 40, 7, 46, 8, 52, 9, 58, 10, 64, 11, 70, 12, 76, 13, 82, 14, 88, 15, 94, 16, 100, 17, 106, 18, 112, 19, 118, 20, 124, 21, 130, 22, 136, 23, 142, 24, 148, 25, 154, 26, 160, 27, 166, 28, 172, 29, 178, 30, 184, 31, 190, 32, 196, 33]

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

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