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.

A361733 Length of the Collatz (3x + 1) trajectory from k = 10^n - 1 to a term less than k, or -1 if the trajectory never goes below k.

Table of values

n a(n)
1 4
2 7
3 17
4 12
5 113
6 17
7 79
8 22
9 51
10 33
11 64
12 35
13 128
14 56
15 110
16 53
17 84
18 128
19 107
20 115
21 175
22 82
23 477
24 172
25 141
26 182
27 188
28 110
29 159
30 167
31 301
32 206
33 151
34 146
35 128
36 195
37 190
38 299
39 208
40 276
41 180
42 185
43 500
44 203
45 229
46 190
47 265
48 270
49 288
50 252
51 299
52 208
53 350
54 348
55 459
56 330
57 314
58 268
59 490
60 361
61 578

List of values

[4, 7, 17, 12, 113, 17, 79, 22, 51, 33, 64, 35, 128, 56, 110, 53, 84, 128, 107, 115, 175, 82, 477, 172, 141, 182, 188, 110, 159, 167, 301, 206, 151, 146, 128, 195, 190, 299, 208, 276, 180, 185, 500, 203, 229, 190, 265, 270, 288, 252, 299, 208, 350, 348, 459, 330, 314, 268, 490, 361, 578]

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

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