id:A070140 - OEIS Search Results

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

+0
5

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; listen)

	OFFSET	`1,64`
	COMMENT	`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: A158757 A085983 A088183 this_sequence A081212 A085491 A116681` `Adjacent sequences: A070137 A070138 A070139 this_sequence A070141 A070142 A070143`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 05 2002`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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