id:A070208 - OEIS Search Results

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

+0
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, 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; listen)

	OFFSET	`1,36`
	COMMENT	`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: A028645 A028710 A028637 this_sequence A028629 A047751 A028706` `Adjacent sequences: A070205 A070206 A070207 this_sequence A070209 A070210 A070211`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 05 2002`

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Last modified December 5 08:23 EST 2009. Contains 170348 sequences.

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