%I A023291
%S A023291 2,1487,2207,2927,8807,11117,16187,17657,26357,44927,45377,48497,91757,
%T A023291 110237,117167,122327,125387,126107,145007,170927,174527,190787,193847,
%U A023291 203897,230567,244247,246017,270287,280547,283937,347957,362237,364337
%N A023291 Numbers n such that n remains prime through 3 iterations of function 
               f(x) = 8x + 1.
%Y A023291 Sequence in context: A135129 A157494 A160087 this_sequence A058423 A110027 
               A062585
%Y A023291 Adjacent sequences: A023288 A023289 A023290 this_sequence A023292 A023293 
               A023294
%K A023291 nonn
%O A023291 1,1
%A A023291 David W. Wilson (davidwwilson(AT)comcast.net)