%I A054215
%S A054215 8281,82848241,98029801,538277538276,998002998001,7783702677837025,
%T A054215 9998000299980001,79225472657922547264,86432513458643251344,
%U A054215 92237976109223797609,99998000029999800001,106710893290106710893289
%N A054215 Squares that are concatenations of two consecutive decreasing numbers.
%F A054215 a(n) = concatenation of A054214(n) and A054214(n)-1. - Max Alekseyev, 
               May 14 2007
%e A054215 E.g. '8242' + '8242-1' gives 82428241 which is 9079^2.
%Y A054215 Cf. A054214, A054216, A030465, A030466, A030467, A020339, A020340.
%Y A054215 Sequence in context: A157731 A064014 A145527 this_sequence A031679 A031589 
               A031769
%Y A054215 Adjacent sequences: A054212 A054213 A054214 this_sequence A054216 A054217 
               A054218
%K A054215 nonn,base
%O A054215 1,1
%A A054215 Patrick De Geest (pdg(AT)worldofnumbers.com), Feb 15 2000.
%E A054215 More terms from Max Alekseyev, May 14 2007