%I A138600
%S A138600 17,21,31,55,85,91,121,159,175,379,555,769
%N A138600 Numbers n such that 2^(2*n-33)-33 is prime.
%e A138600 2^(2*21-33)-33=479, 2^(2*31-33)-33=536870879, 2^(2*55-33)-33=151115727451828646838239, 
               ...
%t A138600 q=33;For[i=q,i<=q,a={};Do[x=2^(2*n-i)-i;If[PrimeQ[x],AppendTo[a,n]],{n,
               10^3}];Print["2^(2*n-",i,")-",i," ",a];i=i+2]
%Y A138600 Sequence in context: A166875 A128546 A060875 this_sequence A050845 A125613 
               A147052
%Y A138600 Adjacent sequences: A138597 A138598 A138599 this_sequence A138601 A138602 
               A138603
%K A138600 nonn
%O A138600 1,1
%A A138600 Vladimir Orlovsky (4vladimir(AT)gmail.com), May 13 2008