id:A063067 - OEIS Search Results

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Numbers expressible as (a^2-1)(b^2-1) in at least 2 distinct ways [b>=a>1].

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4

360, 504, 2304, 2520, 2880, 3465, 5040, 5400, 7920, 9360, 12285, 12600, 12672, 13440, 14400, 17325, 20160, 23040, 27720, 28224, 29400, 30600, 32760, 35640, 38080, 40320, 42840, 47880, 48384, 49920, 51480, 57960, 60480, 63360, 72072 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`K. S. Brown, Numbers Expressible as (a^2-1)(b^2-1)`
	EXAMPLE	`360 is on the list since 360=(2^2-1)(11^2-1)=(4^2-1)(5^2-1)`
	CROSSREFS	`Cf. A057535, A063066, A063068.` `Sequence in context: A060665 A072414 A163569 this_sequence A076205 A048978 A056502` `Adjacent sequences: A063064 A063065 A063066 this_sequence A063068 A063069 A063070`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Jul 08 2001`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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