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Radii of Integer Distance Skew Tetrahedra.
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%I #2 Mar 30 2012 18:55:37

%S 9,18,19,21,23,27,29,33,35,36,37,38,41,42,43,45,46,47,49,51,54,55,57,

%T 58,59,61,63,65,66,67,69,70,71,72,73,74,75,76,77,79,81,82,83,84,85,86,

%U 87,89,90,91,92,93,94,95,97,98,99,101,102,103,105,107,108,110

%N Radii of Integer Distance Skew Tetrahedra.

%C If a,b,c make an acute triangle, then Sqrt[(a^2 + b^2 + c^2)/8] is the radius of a sphenoid (skew tetrahedra) with those faces.

%K nonn

%O 1,1

%A _Ed Pegg Jr_, May 13 2001