A051584 - OEIS

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A051584

Number of integer-sided triangles of area n.

0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,12`
	COMMENTS	`If integer-sided triangle has integer area, area is divisible by 6.`
	CROSSREFS	`Cf. A051585, A051586.` `Sequence in context: A028661 A028714 A028653 * A028645 A028710 A178926` `Adjacent sequences: A051581 A051582 A051583 * A051585 A051586 A051587`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified February 14 01:35 EST 2012. Contains 205567 sequences.