cp's OEIS Frontend

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.

A225840 Largest number less than n occurring in Collatz trajectory starting with n.

Table of values

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

List of values

[1, 2, 2, 4, 5, 5, 4, 8, 8, 10, 10, 10, 13, 10, 8, 16, 17, 17, 16, 16, 20, 20, 16, 22, 20, 23, 26, 26, 23, 23, 16, 29, 26, 20, 34, 34, 34, 38, 20, 40, 32, 40, 40, 40, 40, 46, 24, 40, 44, 44, 40, 40, 53, 53, 52, 56, 52, 58, 53, 53, 61, 61, 32, 56, 58, 58, 52]

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

Content is available under The OEIS End-User License Agreement.