id:A134856 - OEIS Search Results

Search: id:A134856

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Numbers that can be written as (a^2-1)(b^2-1) in three or more distinct ways.

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2880, 27720, 40320, 49920, 63360, 98280, 241920, 282744, 491400, 547200, 604800, 950400, 970200, 1048320, 1370880, 1614600, 1774080, 2489760, 2608320, 2882880, 2923200, 3931200, 4817400, 6126120, 7338240, 7673400, 8426880, 10200960 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Contains A134857 and A134858 as subsequences.`
	LINKS	`MathPages, Numbers Expressible As (a^2-1)(b^2-1).`
	EXAMPLE	`2880 = (2^2-1)(31^2-1) = (3^2-1)(19^2-1) = (5^2-1)(11^2-1).`
	CROSSREFS	`Cf. A134857, A134858.` `Sequence in context: A081427 A101999 A066174 this_sequence A066407 A144547 A035895` `Adjacent sequences: A134853 A134854 A134855 this_sequence A134857 A134858 A134859`
	KEYWORD	`easy,nonn`
	AUTHOR	`Herman Beeksma (herman(AT)beeksma.nl), Nov 13 2007`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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