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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.

A282409 Numbers n for which the number of odd members and the number of even members in the Collatz (3x+1) trajectory are both prime.

Table of values

n a(n)
1 3
2 9
3 10
4 12
5 13
6 22
7 23
8 40
9 42
10 73
11 88
12 90
13 92
14 93
15 114
16 115
17 118
18 119
19 144
20 148
21 149
22 152
23 154
24 162
25 163
26 164
27 165
28 166
29 192
30 208
31 212
32 213
33 226
34 227
35 251
36 295
37 318
38 319
39 350
40 351
41 576
42 592
43 596
44 597
45 608
46 616
47 618
48 625
49 640
50 642
51 643
52 648
53 650
54 652
55 653

List of values

[3, 9, 10, 12, 13, 22, 23, 40, 42, 73, 88, 90, 92, 93, 114, 115, 118, 119, 144, 148, 149, 152, 154, 162, 163, 164, 165, 166, 192, 208, 212, 213, 226, 227, 251, 295, 318, 319, 350, 351, 576, 592, 596, 597, 608, 616, 618, 625, 640, 642, 643, 648, 650, 652, 653]

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

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