Search: id:A072218
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%I A072218
%S A072218 11,8813200023188,8813200023188,8813200023188,
%T A072218 4668731596684224866951378664,682049569465550121055564965940286,
%U A072218 555458774083726674580862268085476627380477854555,555458774083726674580862268085476627380477854555,
               1345428953367763125675365555635765213677633598245431
%N A072218 Consider the Reverse and Add! problem (cf. A001127); of all the n-digit 
               numbers N which eventually reach a palindrome, pick that number N 
               which takes the greatest number of steps to converge (in case of 
               a tie, pick the smallest N); sequence gives palindrome that is reached.
%C A072218 Since we do not even know if 196 eventually converges (see A006960, A023108) 
               for n >= 3 these values are only conjectures.
%H A072218 Jason Doucette, <a href="http://www.jasondoucette.com/worldrecords.html">
               World records</a>
%H A072218 <a href="Sindx_Res.html#RAA">Index entries for sequences related to Reverse 
               and Add!</a>
%Y A072218 Cf. A072216, A072217, A001127, A006960, A023108.
%Y A072218 Sequence in context: A086503 A027569 A131680 this_sequence A046844 A066953 
               A004022
%Y A072218 Adjacent sequences: A072215 A072216 A072217 this_sequence A072219 A072220 
               A072221
%K A072218 nonn,hard,base
%O A072218 1,1
%A A072218 N. J. A. Sloane (njas(AT)research.att.com), Jul 05 2002

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