%I A054214
%S A054214 82,8242,9802,538277,998002,77837026,99980002,7922547265,8643251345,
%T A054214 9223797610,9999800002,106710893290,453378226757,491023832065,
%U A054214 945958034530,999998000002,11916002265170,15790977390245,24917378001937
%N A054214 Numbers n such that n concatenated with n-1 is a square.
%C A054214 Every term contains even number of digits. - Max Alekseyev, May 14 2007
%e A054214 E.g. '8242' + '8242-1' gives 82428241 which is 9079^2.
%Y A054214 Cf. A054215, A054216, A030465, A030466, A030467, A020339, A020340.
%Y A054214 Sequence in context: A097841 A116123 A116142 this_sequence A093241 A120269 
               A015077
%Y A054214 Adjacent sequences: A054211 A054212 A054213 this_sequence A054215 A054216 
               A054217
%K A054214 nonn,base
%O A054214 1,1
%A A054214 Patrick De Geest (pdg(AT)worldofnumbers.com), Feb 15 2000.
%E A054214 More terms from Max Alekseyev, May 14 2007