%I A023280
%S A023280 3,19,47,149,199,233,353,563,607,709,919,1013,1361,1367,1697,1801,1871,
%T A023280 2137,2203,2819,2879,2917,3041,3229,3449,3701,3943,4093,4111,4177,4567,
%U A023280 4973,5519,5689,5987,6053,6359,6421,6841,7019,7283,8647,8951,9109,9719
%N A023280 Numbers n such that n remains prime through 3 iterations of function 
               f(x) = 3x + 10.
%Y A023280 Sequence in context: A162905 A063553 A099007 this_sequence A054697 A112627 
               A100697
%Y A023280 Adjacent sequences: A023277 A023278 A023279 this_sequence A023281 A023282 
               A023283
%K A023280 nonn
%O A023280 1,1
%A A023280 David W. Wilson (davidwwilson(AT)comcast.net)