id:A070139 - OEIS Search Results

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

+0
3

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; listen)

	OFFSET	`1,36`
	COMMENT	`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: A071164 A027345 A086080 this_sequence A116860 A083850 A028718` `Adjacent sequences: A070136 A070137 A070138 this_sequence A070140 A070141 A070142`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 05 2002`

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Last modified September 7 14:45 EDT 2008. Contains 143483 sequences.

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