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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.

A280680 The square roots of the radii (a, b, c) of three primitive mutually tangent circles all touching the same straight line, with a > b > c.

Table of values

n a(n)
1 6
2 3
3 2
4 12
5 4
6 3
7 15
8 10
9 6
10 20
11 5
12 4
13 28
14 21
15 12
16 30
17 6
18 5
19 35
20 14
21 10
22 40
23 24
24 15
25 42
26 7
27 6
28 45
29 36
30 20
31 56
32 8
33 7
34 63
35 18
36 14
37 66
38 55
39 30
40 70
41 30
42 21
43 72
44 9
45 8
46 77
47 44
48 28
49 84
50 60
51 35
52 88
53 33
54 24
55 90
56 10
57 9
58 91
59 78
60 42
61 99
62 22
63 18
64 104
65 65
66 40

List of values

[6, 3, 2, 12, 4, 3, 15, 10, 6, 20, 5, 4, 28, 21, 12, 30, 6, 5, 35, 14, 10, 40, 24, 15, 42, 7, 6, 45, 36, 20, 56, 8, 7, 63, 18, 14, 66, 55, 30, 70, 30, 21, 72, 9, 8, 77, 44, 28, 84, 60, 35, 88, 33, 24, 90, 10, 9, 91, 78, 42, 99, 22, 18, 104, 65, 40]

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

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