id:A028882 - OEIS Search Results

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Numbers n such that n^2 - 7 is prime.

+0
4

3, 6, 12, 18, 24, 36, 48, 54, 60, 66, 90, 96, 108, 132, 138, 156, 162, 174, 186, 192, 204, 216, 222, 228, 240, 246, 270, 306, 318, 330, 360, 366, 384, 390, 408, 438, 450, 468, 474, 480, 492, 498, 522, 570, 576, 582, 606, 612, 618, 624, 636, 642 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`P. De Geest, Palindromic Quasipronics of the form n(n+x)`
	MATHEMATICA	`f[n_]:=PrimeQ[n^2-7]; lst={}; Do[If[f[n], AppendTo[lst, n]], {n, 3, 7!, 1}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 12 2009]`
	CROSSREFS	`Sequence in context: A079830 A160744 A160738 this_sequence A154907 A024513 A116958` `Adjacent sequences: A028879 A028880 A028881 this_sequence A028883 A028884 A028885`
	KEYWORD	`nonn`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com)`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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