%I A158019
%S A158019 11,15,23,27,35,39,83,107,123,143,167,179,195,203,207,227,255,275,279,
%T A158019 347,399,423,455,479,567,587,623,627,695,707,735,759,767,779,795,839,
%U A158019 843,863,867,935,975,983,1007,1043,1095,1115,1155,1215,1227,1283,1323
%N A158019 Numbers such that (n-1)/2 amd 10*n-1 are both prime.
%C A158019 Relating the two prime types:
%C A158019 (p-1)/2,(p-1)/4,(p-1)/6,(p-1)/8,(p-1)/10,(p-1)/12...
%C A158019 and
%C A158019 2*p-1,4*p-1,6*p-1,8*p-1,10*p-1...
%C A158019 where both contain 11,23 subsequence.
%t A158019 Flatten[Table[If[PrimeQ[(n - 1)/2] && PrimeQ[10*n - 1], n, {}], {n, 1, 
               10000}]]
%Y A158019 Sequence in context: A104628 A045564 A087142 this_sequence A054280 A094766 
               A009407
%Y A158019 Adjacent sequences: A158016 A158017 A158018 this_sequence A158020 A158021 
               A158022
%K A158019 nonn
%O A158019 1,1
%A A158019 Roger L. Bagula and Gary W. Adamson (rlbagulatftn(AT)yahoo.com), Mar 
               11 2009, Mar 20 2009