id:A079812 - OEIS Search Results

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Lower of twin primes (p,p+2) such that (p*(p+2))^2 + p^2 - (p+2)^2 and (p*(p+2))^2 - p^2 + (p+2)^2 are both prime.

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5, 5477, 20897, 27689, 36341, 39239, 43649, 51971, 77549, 109661, 121631, 122399, 152027, 153509, 159977, 163481, 189947, 211061, 245981, 285977, 308489, 470087, 497279, 512591, 520631, 522281, 560639, 570461, 573899, 580031, 581729, 591089 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(1) = 5 since 5 and 5+2=7 are primes and (57)^2 + 5^2 - 7^2 = 1201 and (57)^2 - 5^2 + 7^2 = 1249 are both primes.`
	CROSSREFS	`Cf. twin primes and A079797.` `Sequence in context: A024074 A086896 A072021 this_sequence A137694 A117711 A116140` `Adjacent sequences: A079809 A079810 A079811 this_sequence A079813 A079814 A079815`
	KEYWORD	`easy,nonn`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com), Feb 19 2003`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

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