%I A066711
%S A066711 9,18,99,189,117,288,117,288,117,288,117,288,117,288,117,288,117,
%T A066711 288,117,288,117,288,117,288,117,288,117,288,117,288,117,288,117,
%U A066711 288,117,288,117,288,117,288,117,288,117,288,117,288,117,288,117
%N A066711 RATS: Reverse Add Then Sort the digits applied to previous term, starting 
               with 9.
%D A066711 R. K. Guy, Conway's RATS and other reversals, Amer. Math. Monthly, 96 
               (1989), 425-428.
%F A066711 Let a(n) = k, form m by Reversing the digits of k, Add m to k Then Sort 
               the digits of the sum into increasing order to get a(n+1).
%F A066711 Periodic with period 2.
%e A066711 668 -> 668 + 866 = 1534 -> 1345.
%Y A066711 Cf. A004000, A036839, A066710.
%Y A066711 Sequence in context: A107313 A166640 A140149 this_sequence A033651 A050250 
               A080453
%Y A066711 Adjacent sequences: A066708 A066709 A066710 this_sequence A066712 A066713 
               A066714
%K A066711 nonn,base
%O A066711 1,1
%A A066711 N. J. A. Sloane (njas(AT)research.att.com), Jan 19 2002