%I A036949
%S A036949 7,0,787,7877,78787,777787,7778777,77778887,777788887,7777778887,
%T A036949 77777778887,777777777877,7777777787777,77777777778787,777777777777787,
%U A036949 7777777778788777,77777777777778887,777777777787878887
%N A036949 Smallest n-digit prime containing only digits 7 and 8, or 0 if no such 
               prime exists.
%Y A036949 Cf. A036229, A020470, A036321.
%Y A036949 Sequence in context: A167317 A024094 A157307 this_sequence A059515 A136428 
               A152447
%Y A036949 Adjacent sequences: A036946 A036947 A036948 this_sequence A036950 A036951 
               A036952
%K A036949 nonn,base
%O A036949 1,1
%A A036949 Patrick De Geest (pdg(AT)worldofnumbers.com), Jan 04 1999.