id:A077435 - OEIS Search Results

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Number of right triangles whose vertices are lattice points in {1,2,...,n} X {1,2,...,n}.

+0
1

1, 4, 44, 200, 596, 1444, 2960, 5520, 9496, 15332, 23596, 34936, 50020, 69732, 94816, 126176, 164960, 212372, 269620, 337960, 418716, 513444, 623736, 751152, 897776, 1065220, 1255460, 1470680 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`For n=2 the right triangles are` `... * * . * * . * .. and .. ` `... ..... * . * * ..... * *` `so a(2)=4.`
	CROSSREFS	`Sequence in context: A071125 A053314 A051223 this_sequence A074751 A129551 A081078` `Adjacent sequences: A077432 A077433 A077434 this_sequence A077436 A077437 A077438`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Nov 30 2002`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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