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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.

A177001 The number of 3x+1 steps in the Collatz iteration of A033491(n), the least number requiring n iterations.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 1
6 1
7 2
8 2
9 2
10 2
11 2
12 3
13 3
14 4
15 4
16 5
17 5
18 5
19 6
20 6
21 6
22 6
23 7
24 7
25 7
26 8
27 8
28 8
29 9
30 9
31 9
32 10
33 10
34 11
35 11
36 11
37 11
38 12
39 12
40 12
41 13
42 13
43 13
44 14
45 14
46 15
47 15
48 15
49 16
50 16
51 16
52 17
53 17
54 18
55 18
56 18
57 18
58 19
59 19
60 20
61 20
62 20
63 21
64 21
65 22
66 22
67 23
68 23
69 24
70 24
71 24
72 24
73 25
74 25
75 25
76 26
77 26
78 27
79 27
80 28

List of values

[0, 0, 0, 0, 1, 1, 2, 2, 2, 2, 2, 3, 3, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 11, 11, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 15, 15, 15, 16, 16, 16, 17, 17, 18, 18, 18, 18, 19, 19, 20, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 24, 24, 25, 25, 25, 26, 26, 27, 27, 28]

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