id:A099833 - OEIS Search Results

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Perimeters of Pythagorean triangles that can be constructed in exactly 4 different ways.

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240, 360, 480, 504, 630, 672, 756, 780, 900, 960, 990, 1020, 1092, 1140, 1170, 1188, 1344, 1386, 1400, 1428, 1530, 1540, 1596, 1638, 1820, 1920, 1932, 1950, 2070, 2112, 2240, 2244, 2268, 2376, 2380, 2448, 2496, 2508, 2610, 2652, 2660, 2688, 2736, 2800 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Ron Knott, Pythagorean Triples and Online Calculators` `Eric Weisstein's World of Mathematics, Pythagorean Triple.` `Index entries related to Pythagorean Triples.`
	EXAMPLE	`a(1)=240 = 15+112+113 = 40+96+104 = 48+90+102 = 60+80+100; a(2)=360 = 36+160+164 = 60+144+156 = 72+135+153 = 90+120+150.`
	CROSSREFS	`Sequence in context: A031173 A067373 A030638 this_sequence A154378 A063372 A070123` `Adjacent sequences: A099830 A099831 A099832 this_sequence A099834 A099835 A099836`
	KEYWORD	`nonn`
	AUTHOR	`Hugo Pfoertner (hugo(AT)pfoertner.org), Oct 27 2004`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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