id:A100836 - OEIS Search Results

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a(n) = smallest value k > 1 with k^2-1 is divisible by n^2.

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2, 3, 8, 7, 24, 17, 48, 31, 80, 49, 120, 17, 168, 97, 26, 127, 288, 161, 360, 49, 197, 241, 528, 127, 624, 337, 728, 97, 840, 199, 960, 511, 485, 577, 99, 161, 1368, 721, 170, 351, 1680, 197, 1848, 241, 649, 1057, 2208, 127, 2400, 1249, 577, 337, 2808, 1457, 1451 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(4)=7 because 7^2-1 is divisible by 4^2 (and 7 is the smallest integer > 1 that fits this equation)`
	CROSSREFS	`Adjacent sequences: A100833 A100834 A100835 this_sequence A100837 A100838 A100839` `Sequence in context: A109230 A036970 A110144 this_sequence A100805 A068800 A114585`
	KEYWORD	`nonn`
	AUTHOR	`Thomas Kerscher (Thomas.Kerscher(AT)web.de), Jan 19 2005`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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