id:A108403 - OEIS Search Results

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Numbers n such that n^2-6 and n^2+6 are both prime.

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5, 25, 65, 145, 355, 605, 985, 1075, 1295, 1465, 1565, 1675, 1915, 2345, 2425, 2585, 2755, 3005, 3155, 3785, 4595, 4625, 4975, 5225, 5465, 5665, 5905, 5915, 6115, 6295, 6305, 6415, 6485, 7235, 7775, 8185, 9065, 9275, 9415, 9755 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`All members of the sequence are divisible by 5 as if n is 1 or 4 mod 5 then n^2-6 is divisible by 5 and if n is 2 or 3 mod 5 then n^2+6 is divisible by 5.`
	EXAMPLE	`a(2)=25 since 25^2-6=619 and 25^2+6=631 are both prime.`
	CROSSREFS	`Cf. A108701.` `Sequence in context: A060820 A146404 A054994 this_sequence A007058 A071383 A088959` `Adjacent sequences: A108400 A108401 A108402 this_sequence A108404 A108405 A108406`
	KEYWORD	`nonn`
	AUTHOR	`John L. Drost (drost(AT)marshall.edu), Jul 04 2005`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

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