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 A353782 #35 Mar 20 2023 10:39:40 %S A353782 112,1264,5548,14976,37092,77096,143560,237504 %N A353782 Number of regions 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 A353782 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 A353782 No formula for a(n) is currently known. %H A353782 Scott R. Shannon, <a href="/A353782/a353782.jpg">Image for n = 1</a>. %H A353782 Scott R. Shannon, <a href="/A353782/a353782_1.jpg">Image for n = 2</a>. %H A353782 Scott R. Shannon, <a href="/A353782/a353782_2.jpg">Image for n = 3</a>. %H A353782 Scott R. Shannon, <a href="/A353782/a353782_3.jpg">Image for n = 4</a>. %F A353782 a(n) = A356358 - A354605(n) + 1 by Euler's formula. %Y A353782 Cf. A354605 (vertices), A356358 (edges), A361623 (k-gons), A361622 (distinct circles), A359933, A359860, A359253, A359570, A359046. %K A353782 nonn,more %O A353782 1,1 %A A353782 _Scott R. Shannon_, Mar 13 2023