A070140 - OEIS

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A070140

Number of acute integer triangles with perimeter n having integral area.

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, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,64`
	COMMENTS	`a(n) = A051516(n) - A070141(n) - A024155(n).`
	LINKS	`Eric Weisstein's World of Mathematics, Heronian Triangle.` `Eric Weisstein's World of Mathematics, Acute Triangle.` `R. Zumkeller, Integer-sided triangles`
	CROSSREFS	`Cf. A051516, A070093, A070146.` `Sequence in context: A176917 A085983 A088183 * A081212 A085491 A116681` `Adjacent sequences: A070137 A070138 A070139 * A070141 A070142 A070143`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 05 2002`

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Last modified February 15 17:13 EST 2012. Contains 205828 sequences.