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 A354605 #57 Mar 20 2023 10:39:35 %S A354605 101,1145,5001,13753,34497,72185,135157,224321 %N A354605 Number of vertices 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 A354605 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 A354605 No formula for a(n) is currently known. %H A354605 Scott R. Shannon, <a href="/A354605/a354605.jpg">Image for n = 1</a>. %H A354605 Scott R. Shannon, <a href="/A354605/a354605_1.jpg">Image for n = 2</a>. %H A354605 Scott R. Shannon, <a href="/A354605/a354605_3.jpg">Image for n = 3</a>. %F A354605 a(n) = A356358 - A353782(n) + 1 by Euler's formula. %Y A354605 Cf. A353782 (regions), A356358 (edges), A361623 (k-gons), A361622 (distinct circles), A359932, A359859, A359252, A359569, A331702. %K A354605 nonn,more %O A354605 1,1 %A A354605 _Scott R. Shannon_, Mar 13 2023