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A060993 Radii of Integer Distance Skew Tetrahedra. 0
9, 18, 19, 21, 23, 27, 29, 33, 35, 36, 37, 38, 41, 42, 43, 45, 46, 47, 49, 51, 54, 55, 57, 58, 59, 61, 63, 65, 66, 67, 69, 70, 71, 72, 73, 74, 75, 76, 77, 79, 81, 82, 83, 84, 85, 86, 87, 89, 90, 91, 92, 93, 94, 95, 97, 98, 99, 101, 102, 103, 105, 107, 108, 110 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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.

LINKS

Table of n, a(n) for n=1..64.

CROSSREFS

Sequence in context: A250769 A158908 A202188 * A107977 A092457 A062057

Adjacent sequences:  A060990 A060991 A060992 * A060994 A060995 A060996

KEYWORD

nonn

AUTHOR

Ed Pegg Jr, May 13 2001

STATUS

approved

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Last modified November 27 17:39 EST 2014. Contains 250249 sequences.