

A067561


Radii n of circles with integer radius that can approximately be squared integrally: the floor or ceiling of Pi*n^2 is an integer square.


1



1, 22, 167, 334, 4821, 328663, 657326, 18796631, 37593262, 56389893, 75186524, 1591338537
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OFFSET

1,2


COMMENTS



LINKS



EXAMPLE

Ceiling(Pi*22^2) = 39^2, so 22 is a term of the sequence.


MATHEMATICA

Do[m = Pi*i^2; r = IntegerQ[Sqrt[Floor[m]]]; s = IntegerQ[Sqrt[Ceiling[m]]]; If[r  s, Print[i]], {i, 1, 10^6}]


CROSSREFS



KEYWORD

nonn,more


AUTHOR



EXTENSIONS



STATUS

approved



