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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.

A264788 a(n) is the number of circles added at n-th iteration of the pattern starting with 2 circles. (See comment.)

Table of values

n a(n)
0 2
1 2
2 4
3 4
4 6
5 10
6 10
7 12
8 16
9 16
10 18
11 22
12 22
13 24
14 28
15 28
16 30
17 34
18 34
19 36
20 40
21 40
22 42
23 46
24 46
25 48
26 52
27 52
28 54
29 58
30 58
31 60
32 64
33 64
34 66
35 70
36 70
37 72
38 76
39 76
40 78
41 82
42 82
43 84
44 88
45 88
46 90
47 94
48 94
49 96
50 100
51 100
52 102
53 106
54 106
55 108
56 112
57 112
58 114
59 118
60 118
61 120
62 124

List of values

[2, 2, 4, 4, 6, 10, 10, 12, 16, 16, 18, 22, 22, 24, 28, 28, 30, 34, 34, 36, 40, 40, 42, 46, 46, 48, 52, 52, 54, 58, 58, 60, 64, 64, 66, 70, 70, 72, 76, 76, 78, 82, 82, 84, 88, 88, 90, 94, 94, 96, 100, 100, 102, 106, 106, 108, 112, 112, 114, 118, 118, 120, 124]

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

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