%I A028868
%S A028868 2,3,29,31
%N A028868 Primes that when squared give numbers with digits in descending order.
%C A028868 No other solutions below 2.10^9 (probably finite) - Dec 15 1999
%Y A028868 Cf. A028869, A028865, A028866.
%Y A028868 Sequence in context: A126266 A003017 A096580 this_sequence A081332 A106868 
               A098419
%Y A028868 Adjacent sequences: A028865 A028866 A028867 this_sequence A028869 A028870 
               A028871
%K A028868 nonn,base,hard
%O A028868 1,1
%A A028868 Patrick De Geest (pdg(AT)worldofnumbers.com)