id:A135622 - OEIS Search Results

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16*Area^2 of integer triangles [A070080(n),A070081(n),A70082(n)].

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3, 15, 48, 35, 63, 128, 63, 135, 243, 240, 320, 99, 231, 275, 495, 384, 576, 768, 143, 351, 455, 819, 975, 560, 896, 1008, 1344, 195, 495, 675, 1215, 735, 1575, 1875, 768, 1280, 1536, 2048, 2304, 255, 663, 935, 1683, 1071, 2295, 2499, 2975, 1008, 1728 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A070086(n) = round(sqrt(a(n))/4).`
	FORMULA	`a(n)=(u+v+w)(-u+v+w)(u-v+w)*(u+v-w), where u=A070080(n), v=A070081(n), w=A070082(n).`
	EXAMPLE	`A070080(4)=1, A070081(4)=3, A070082(4)=3, so a(4)=(1+3+3)(-1+3+3)(1-3+3)*(1+3-3)=35.`
	CROSSREFS	`Sequence in context: A110464 A088108 A163383 this_sequence A061316 A124161 A089580` `Adjacent sequences: A135619 A135620 A135621 this_sequence A135623 A135624 A135625`
	KEYWORD	`nonn`
	AUTHOR	`Franz Vrabec (franz.vrabec(AT)aon.at), Feb 29 2008`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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