%I #11 Mar 31 2012 12:38:46
%S 1,5,25,125,65,3125,15625,325,390625,1953125,1625,48828125,4225,1105,
%T 6103515625,30517578125,40625,21125,3814697265625,203125,
%U 95367431640625,476837158203125,5525,11920928955078125,274625
%N a(n) is smallest integral radius of circle centered at (0,0) having 8n4 lattice points on its circumference; a(n)/2 is smallest halfintegral radius circle centered at (1/2,0) having 4n2 lattice points; a(n)/3 is smallest thirdintegral radius circle centered at (1/3,0) having 2n1 lattice points.
%H Ray Chandler, <a href="/A046112/b046112.txt">Table of n, a(n) for n = 1..1439</a> (a(1440) exceeds 1000 digits).
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/CircleLatticePoints.html">Circle Lattice Points</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PythagoreanTriple.html">Pythagorean Triple</a>
%Y Except for offset, same as A006339.
%Y Cf. A046109, A046110, A046111, A000328.
%K nonn
%O 1,2
%A _Eric W. Weisstein_
