A024363 - OEIS

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A024363

Number of primitive Pythagorean triangles with side n.

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

	OFFSET	`1,5`
	COMMENTS	`Consider primitive Pythagorean triangles (A^2 + B^2 = C^2, (A, B) = 1, A <= B); sequence gives number of times AUBUC takes value n.`
	LINKS	`Ron Knott, Pythagorean Triples and Online Calculators`
	FORMULA	`a(n)=0 for n=1 and n=2 (mod 4)=A016825. a(n)=A024361(n)+A024362(n). - Lekraj Beedassy (blekraj(AT)yahoo.com), Dec 01 2003`
	CROSSREFS	`Cf. A024361, A024362.` `Sequence in context: A074272 A105553 A117165 * A050600 A129691 A117454` `Adjacent sequences: A024360 A024361 A024362 * A024364 A024365 A024366`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified February 14 06:48 EST 2012. Contains 205577 sequences.