id:A111148 - OEIS Search Results

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Numbers n such that 5*n^2 + 4 is prime.

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9, 15, 33, 51, 57, 99, 111, 117, 135, 141, 183, 189, 195, 267, 309, 327, 345, 369, 387, 399, 405, 411, 429, 441, 447, 495, 513, 525, 537, 567, 603, 609, 645, 663, 681, 687, 705, 723, 777, 783, 789, 807, 813, 831, 861, 897, 909, 915, 981 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`If n=399 then 5*n^2 + 4 = 796009 (prime).`
	MATHEMATICA	`Select[Range[1000], PrimeQ[5*#^2 + 4] &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 26 2006`
	CROSSREFS	`Sequence in context: A091296 A107076 A155775 this_sequence A125216 A058505 A133763` `Adjacent sequences: A111145 A111146 A111147 this_sequence A111149 A111150 A111151`
	KEYWORD	`nonn`
	AUTHOR	`Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Oct 18 2005`
	EXTENSIONS	`More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 26 2006`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

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