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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.

A221470 Least m such that the Collatz (3x+1) iteration of m has exactly n increasing peak values.

Table of values

n a(n)
0 1
1 5
2 3
3 7
4 15
5 287
6 191
7 127
8 223
9 159
10 143
11 95
12 63
13 47
14 31
15 27
16 703
17 6471
18 6383
19 4255
20 6887
21 4591
22 50427
23 47867
24 31911
25 77671
26 161439
27 113383
28 239231
29 159487
30 1027431
31 974079
32 730559
33 487039
34 432923
35 288615
36 270271
37 3041391
38 9158655
39 6416623
40 16786431
41 12589823

List of values

[1, 5, 3, 7, 15, 287, 191, 127, 223, 159, 143, 95, 63, 47, 31, 27, 703, 6471, 6383, 4255, 6887, 4591, 50427, 47867, 31911, 77671, 161439, 113383, 239231, 159487, 1027431, 974079, 730559, 487039, 432923, 288615, 270271, 3041391, 9158655, 6416623, 16786431, 12589823]

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

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