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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.

A245943 Irregular triangle read by rows of a variation of the Collatz iteration with signature (1,2).

Table of values

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

List of values

[3, 6, 4, 3, 4, 3, 5, 12, 7, 18, 10, 6, 4, 3, 6, 4, 3, 7, 18, 10, 6, 4, 3, 8, 5, 12, 7, 18, 10, 6, 4, 3, 9, 24, 13, 36, 19, 54, 28, 15, 42, 22, 12, 7, 18, 10, 6, 4, 3, 10, 6, 4, 3, 11, 30, 16, 9, 24, 13, 36, 19, 54, 28, 15, 42, 22, 12, 7, 18, 10, 6, 4, 3]

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

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