%I A050714
%S A050714 19,21,37,39,43,49,51,57,61,63,67,73,91,97,113,119,123,129,131,137,147,
%T A050714 149,153,159,171,177,183,197,203,209,227,243,257,279,281,287,293,311,
%U A050714 317,353,359,369,377,381,383,387,389,399,401,429,449,453,459,461,467
%N A050714 Inserting a digit '4' between adjacent digits of n makes a prime.
%e A050714 E.g. 389 becomes 3(4)8(4)9 which is prime 34849.
%Y A050714 Cf. A050674, A050711-A050719.
%Y A050714 Sequence in context: A020347 A054864 A158232 this_sequence A113868 A023152 
               A056025
%Y A050714 Adjacent sequences: A050711 A050712 A050713 this_sequence A050715 A050716 
               A050717
%K A050714 nonn,base
%O A050714 0,1
%A A050714 Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1999.