The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A070205 Number of acute integer triangles with perimeter n having integral inradius. 3
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,84 COMMENTS a(n) = A070201(n) - A024155(n) - A070206(n). REFERENCES Mohammad K. Azarian, Circumradius and Inradius, Problem S125, Math Horizons, Vol. 15, Issue 4, April 2008, p. 32.  Solution published in Vol. 16, Issue 2, November 2008, p. 32. LINKS Eric Weisstein's World of Mathematics, Incircle. Eric Weisstein's World of Mathematics, Acute Triangle. R. Zumkeller, Integer-sided triangles CROSSREFS Cf. A070140, A070093. Sequence in context: A028605 A319532 A317576 * A138363 A080225 A122841 Adjacent sequences:  A070202 A070203 A070204 * A070206 A070207 A070208 KEYWORD nonn AUTHOR Reinhard Zumkeller, May 05 2002 STATUS approved

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

Last modified August 10 07:42 EDT 2022. Contains 356029 sequences. (Running on oeis4.)