A070208 - OEIS

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A070208

Number of integer triangles with perimeter n having integral area but not integral inradius.

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, 2, 0, 2, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,36`
	COMMENTS	`a(n) = A051516(n) - A070201(n).`
	LINKS	`Eric Weisstein's World of Mathematics, Incircle.` `Eric Weisstein's World of Mathematics, Heron's Formula.` `R. Zumkeller, Integer-sided triangles`
	CROSSREFS	`Sequence in context: A028710 A178926 A028637 * A028629 A047751 A028706` `Adjacent sequences: A070205 A070206 A070207 * A070209 A070210 A070211`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 05 2002`

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Last modified February 17 12:30 EST 2012. Contains 206013 sequences.