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A138641 Nonnegative integers n such that 19*n-2 is prime. 0

%I #5 Aug 22 2017 17:29:29

%S 1,7,15,19,21,31,37,39,45,49,51,75,79,85,99,105,109,117,121,127,141,

%T 145,147,159,169,175,177,199,207,211,219,225,229,235,247,249,259,261,

%U 271,277,285,291,297,301,309,325,327,331,345,357,361,367,381,387,397

%N Nonnegative integers n such that 19*n-2 is prime.

%e 19*1-2=17, 19*7-2=131, 19*15-2=283, ...

%t a={};Do[x=19*n-2;If[PrimeQ[x],AppendTo[a,n]],{n,10^2}];a

%t Select[Range[400],PrimeQ[19#-2]&] (* _Harvey P. Dale_, Aug 22 2017 *)

%K nonn

%O 1,2

%A _Vladimir Joseph Stephan Orlovsky_, May 15 2008

%E More terms from _Harvey P. Dale_, Aug 22 2017

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Last modified February 26 09:17 EST 2024. Contains 370336 sequences. (Running on oeis4.)