%I A117243
%S A117243 3,5,7,11,13,17,19,29,31,107,109,137,139,179,181,197,199
%N A117243 Chen numbers which are also twin primes.
%e A117243 (3, 5) are twin numbers and also Chen numbers.
%Y A117243 Cf. A001097, A109611.
%Y A117243 Sequence in context: A132143 A045393 A001097 this_sequence A059362 A059264 
               A038604
%Y A117243 Adjacent sequences: A117240 A117241 A117242 this_sequence A117244 A117245 
               A117246
%K A117243 nonn
%O A117243 0,1
%A A117243 Jani Melik (jani_melik(AT)hotmail.com), Apr 22 2006