Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #12 Mar 08 2015 14:17:40
%S 11,13,41,73,521
%N Consider primes p and q such that p = 2^k + 9 and q = 2^(k+1) + 9 for some k; sequence gives values of p.
%C No additional terms up to k=5000. - _Harvey P. Dale_, Mar 08 2015
%t 2^#+9&/@(Flatten[Position[Partition[If[PrimeQ[#],1,0]&/@(2^Range[10]+ 9),2,1],{1,1}]]) (* _Harvey P. Dale_, Mar 08 2015 *)
%o (PARI) g(m,n,b) = { for(x=0,n, y=m+b^x+b%2; z=m+b^(x+1)+b%2; if(isprime(y)&isprime(z),print1(y",") ) ) }
%Y Cf. A108265.
%K nonn
%O 1,1
%A _Cino Hilliard_, Jun 29 2005