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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.

A242394 Number of equilateral triangles (sides length = 1) that intersect the circumference of a circle of radius n centered at (0,0).

Table of values

n a(n)
1 6
2 18
3 30
4 42
5 54
6 66
7 66
8 102
9 114
10 126
11 138
12 150
13 150
14 162
15 198
16 210
17 222
18 234
19 222
20 270
21 258
22 294
23 306
24 318
25 330
26 330
27 366
28 354
29 390
30 402
31 390
32 426
33 450
34 462
35 450
36 486
37 474
38 486
39 510
40 546
41 558
42 546
43 558
44 594
45 606
46 630
47 642
48 654
49 618
50 678
51 690
52 690
53 726
54 738
55 750
56 738
57 750

List of values

[6, 18, 30, 42, 54, 66, 66, 102, 114, 126, 138, 150, 150, 162, 198, 210, 222, 234, 222, 270, 258, 294, 306, 318, 330, 330, 366, 354, 390, 402, 390, 426, 450, 462, 450, 486, 474, 486, 510, 546, 558, 546, 558, 594, 606, 630, 642, 654, 618, 678, 690, 690, 726, 738, 750, 738, 750]

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

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