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A153261 Primes p such that 3*p-2 is not prime. 0

%I

%S 2,17,19,29,31,41,59,73,79,83,89,97,101,107,109,131,139,149,151,157,

%T 173,179,197,199,223,227,229,233,239,241,269,281,283,311,317,349,353,

%U 359,367,379,383,389,397,409,419,421,439,449,457,463,479,499,503,509,521

%N Primes p such that 3*p-2 is not prime.

%C 3*2-2=4 not prime, 17*3-2=49 not prime,... 3*3-2=7 is prime and not in this sequence.

%t lst={};Do[p=Prime[n];If[ !PrimeQ[3*p-2],AppendTo[lst,p]],{n,6!}];lst

%Y Cf. A153184, A088878

%Y Cf. A153238 [From _Vincenzo Librandi_, Jan 01 2009]

%K nonn

%O 1,1

%A _Vladimir Joseph Stephan Orlovsky_, Dec 22 2008

%E Minor edits by _N. J. A. Sloane_, Jul 08 2010

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Last modified March 21 01:18 EDT 2019. Contains 321356 sequences. (Running on oeis4.)