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%I A023207 #24 Sep 08 2022 08:44:47
%S A023207 2,5,7,11,17,19,29,31,37,47,59,61,71,79,101,107,109,127,131,137,149,
%T A023207 151,179,211,227,229,239,241,257,269,277,281,311,317,337,359,367,389,
%U A023207 401,409,439,449,479,487,491,521,541,547,557,571,577,607,641,647,659,709,719,739
%N A023207 Numbers m such that m and 2*m + 9 both prime.
%H A023207 Vincenzo Librandi, <a href="/A023207/b023207.txt">Table of n, a(n) for n = 1..1000</a>
%t A023207 Select[Prime@Range@250,PrimeQ[2#+9]&] (* _Vladimir Joseph Stephan Orlovsky_, Apr 25 2011 *)
%o A023207 (Magma) [ n: n in PrimesUpTo(1000) | IsPrime(2*n+9) ]; // _Vincenzo Librandi_, Nov 20 2010
%Y A023207 Cf. A005384, A023204, A023205.
%K A023207 nonn,easy
%O A023207 1,1
%A A023207 _David W. Wilson_

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