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%I #9 Mar 20 2023 10:39:26
%S 13,46,99,164,257,370,503,648,821,1014,1227,1444,1697,1970,2255
%N Number of 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 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.
%C No formula for a(n) is known.
%C See A354605 and A353782 for images of the resulting vertices and regions.
%Y Cf. A354605 (vertices), A353782 (regions), A356358 (edges), A361623 (k-gons)
%K nonn,more
%O 1,1
%A _Scott R. Shannon_, Mar 18 2023
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