id:A111147 - OEIS Search Results

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Numbers n such that 5*n^2 + 1 is prime.

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6, 18, 36, 42, 84, 102, 108, 132, 144, 150, 162, 168, 174, 186, 192, 246, 276, 288, 300, 312, 330, 354, 372, 384, 396, 402, 456, 462, 498, 510, 522, 528, 552, 564, 570, 582, 612, 636, 648, 708, 738, 804, 816, 834, 840, 846, 882, 888, 924, 930, 942, 972, 990 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`If n=312 then 5*n^2 + 1 = 486721 (prime).`
	MATHEMATICA	`Select[Range[1000], PrimeQ[5*#^2 + 1] &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 26 2006`
	CROSSREFS	`Sequence in context: A134078 A038343 A110965 this_sequence A152539 A069958 A028896` `Adjacent sequences: A111144 A111145 A111146 this_sequence A111148 A111149 A111150`
	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 25 20:09 EST 2009. Contains 167514 sequences.

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