id:A134858 - OEIS Search Results

Search: id:A134858

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

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588107520, 67270694400, 546939993600, 2128050512640, 37400697734400, 5566067918611200 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Subsequence of A134856 and A134857.`
	LINKS	`MathPages, Numbers Expressible As (a^2-1)(b^2-1).`
	EXAMPLE	`588107520 = (13^2-1)(1871^2-1) = (17^2-1)(1429^2-1) = (55^2-1)(441^2-1) = (79^2-1)(307^2-1) = (129^2-1)(188^2-1).`
	CROSSREFS	`Cf. A134856, A134857.` `Adjacent sequences: A134855 A134856 A134857 this_sequence A134859 A134860 A134861` `Sequence in context: A071135 A032755 A057535 this_sequence A145277 A123705 A018786`
	KEYWORD	`hard,more,nonn`
	AUTHOR	`Herman Beeksma (herman(AT)beeksma.nl), Nov 13 2007`

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Last modified January 8 02:43 EST 2009. Contains 152824 sequences.