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 A070206 Number of obtuse 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, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 4, 0, 0, 0, 1, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,84 COMMENTS a(n) = A070201(n) - A024155(n) - A070205(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, Obtuse Triangle. R. Zumkeller, Integer-sided triangles CROSSREFS Cf. A070141, A070101. Sequence in context: A274948 A005925 A333037 * A228368 A267701 A128975 Adjacent sequences:  A070203 A070204 A070205 * A070207 A070208 A070209 KEYWORD nonn AUTHOR Reinhard Zumkeller, May 05 2002 STATUS approved

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