id:A123986 - OEIS Search Results

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Numbers n for which 4n+1 and 4n+3 are primes.

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1, 4, 7, 10, 25, 34, 37, 49, 67, 70, 115, 130, 142, 154, 160, 202, 205, 214, 220, 262, 265, 307, 319, 322, 325, 370, 424, 430, 469, 487, 499, 520, 532, 535, 559, 577, 595, 637, 664, 682, 697, 700, 742, 814, 832, 847, 865, 889, 895, 955, 979, 982, 1000, 1012, 1039 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`Select[Range[1100], And @@ PrimeQ /@ ({1, 3} + 4#) &] (Chandler)`
	CROSSREFS	`Cf. A005098, A005099, A095278.` `Sequence in context: A024726 A024948 A032818 this_sequence A088405 A100591 A135262` `Adjacent sequences: A123983 A123984 A123985 this_sequence A123987 A123988 A123989`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Oct 30 2006`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 05 2006`

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Last modified December 3 16:57 EST 2008. Contains 151279 sequences.

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