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 A046112 a(n) is smallest integral radius of circle centered at (0,0) having 8n-4 lattice points on its circumference; a(n)/2 is smallest half-integral radius circle centered at (1/2,0) having 4n-2 lattice points; a(n)/3 is smallest third-integral radius circle centered at (1/3,0) having 2n-1 lattice points. 7
 1, 5, 25, 125, 65, 3125, 15625, 325, 390625, 1953125, 1625, 48828125, 4225, 1105, 6103515625, 30517578125, 40625, 21125, 3814697265625, 203125, 95367431640625, 476837158203125, 5525, 11920928955078125, 274625 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Ray Chandler, Table of n, a(n) for n = 1..1439 (a(1440) exceeds 1000 digits). Eric Weisstein's World of Mathematics, Circle Lattice Points Eric Weisstein's World of Mathematics, Pythagorean Triple CROSSREFS Except for offset, same as A006339. Cf. A046109, A046110, A046111, A000328. Sequence in context: A036156 A097756 A006339 * A032534 A036151 A271380 Adjacent sequences: A046109 A046110 A046111 * A046113 A046114 A046115 KEYWORD nonn AUTHOR Eric W. Weisstein STATUS approved

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Last modified December 4 16:44 EST 2023. Contains 367563 sequences. (Running on oeis4.)