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.
%I A356358 #36 Mar 20 2023 10:39:31 %S A356358 212,2408,10548,28728,71588,149280,278716,461824 %N A356358 Number of edges among all distinct circles that can be constructed from a point on the origin and n equally spaced points on each of the +x,-x,+y,-y coordinates axes using only a compass. %C A356358 A circle is constructed for every pair of the 1 + 4n points, the first point defines the circle's center while the second the radius distance. The number of distinct circles constructed from the points is A361622(n). %C A356358 No formula for a(n) is known. %C A356358 See A354605 and A353782 for images of the vertices and regions. %F A356358 a(n) = A353782(n) + A354605(n) - 1 by Euler's formula. %Y A356358 Cf. A354605 (vertices), A353782 (regions), A361623 (k-gons), A361622 (distinct circles), A359934, A359861, A359254, A359571, A359047. %K A356358 nonn,more %O A356358 1,1 %A A356358 _Scott R. Shannon_, Mar 13 2023