login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 A257226 A092457

Adjacent sequences:  A060990 A060991 A060992 * A060994 A060995 A060996

KEYWORD

nonn

AUTHOR

Ed Pegg Jr, May 13 2001

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 7 05:39 EST 2016. Contains 278841 sequences.