%I A129623
%S A129623 252,403,574,736,765,976,1008,1207,1300,1458,1462,1612,1729,1855,1944,
%T A129623 2268,2296,2430,2668,2701,2944,3154,3478,3627,3640,4032,4275,4606,4930,
%U A129623 5092,5605,5848,6624,6786,7663,8722,20502,23632,26962,30492,31003,34222
%N A129623 Numbers which are the product of a nonpalindrome and its reversal, where 
               leading zeros are not allowed.
%C A129623 The smallest square in this sequence is 63504 = 252*252 = 144*441.
%e A129623 252 = 12*21
%t A129623 Take[Union[ Transpose[ Select[Table[{n, n* FromDigits[Reverse[IntegerDigits[n]]]}, 
               {n, 1000}], Mod[ #[[1]], 10] != 0 && #[[1]] != FromDigits[Reverse[IntegerDigits[ 
               #[[1]]]]] &]][[2]]], 100]
%Y A129623 Cf. A072443 Nonsquares which are the product of two numbers with the 
               same digits (leading zeros are forbidden). A076750 Squares which 
               are the product of a nonpalindrome and its reversal, where leading 
               zeros are not allowed.
%Y A129623 Sequence in context: A066695 A104396 A072443 this_sequence A062904 A032800 
               A024749
%Y A129623 Adjacent sequences: A129620 A129621 A129622 this_sequence A129624 A129625 
               A129626
%K A129623 base,nonn
%O A129623 0,1
%A A129623 Tanya Khovanova (tanyakh(AT)yahoo.com), May 30 2007