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 A070139 Number of isosceles integer triangles with perimeter n having integral area. 2
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,36 COMMENTS a(n) = A051516(n) - A024153(n). LINKS Eric Weisstein's World of Mathematics, Heronian Triangle. R. Zumkeller, Integer-sided triangles CROSSREFS Cf. A051516, A024153, A059169, A070145. Sequence in context: A027345 A086080 A281477 * A116860 A179391 A083850 Adjacent sequences:  A070136 A070137 A070138 * A070140 A070141 A070142 KEYWORD nonn AUTHOR Reinhard Zumkeller, May 05 2002 STATUS approved

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