Search: id:A072427
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%I A072427
%S A072427 0,2,4,6,8,10,11,12,14,16,18,101,141,161,181,198,201,221,241,261,281,
%T A072427 1001,1818,1838,1858,1878,1898,1918,1938,1958,1978,1998,2981,10001,
%U A072427 10201,10401,10601,10801,11001,11201,11401,11601,11801,18018,19998
%N A072427 Numbers n for which there is a unique k such that n = k + reverse(k).
%C A072427 Subsequence of A067030. First term is A072041(1). A068065 is a subsequence 
               of this sequence.
%H A072427 <a href="Sindx_Res.html#RAA">Index entries for sequences related to Reverse 
               and Add!</a>
%e A072427 18 = 9 + 9; 261 = 180 + 081; 11401 = 10700 + 00701.
%o A072427 (ARIBAS) var n,k,c,i,rev: integer; st,nst: string; end; m := 1; for n 
               := 0 to 29000 do k := n div 2; c := 0; while k <= n and c < m + 1 
               do st := itoa(k); nst := ""; for i := 0 to length(st) - 1 do nst 
               := concat(st[i],nst); end; rev := atoi(nst); if n = k + rev then 
               inc(c); if k mod 10 <> 0 and k <> rev then inc(c); end; end; inc(k); 
               end; if c = m then write(n,","); end; end;
%Y A072427 Cf. A067030, A068065, A072041, A072040, A071914.
%Y A072427 Sequence in context: A154809 A153170 A067030 this_sequence A050420 A096922 
               A055954
%Y A072427 Adjacent sequences: A072424 A072425 A072426 this_sequence A072428 A072429 
               A072430
%K A072427 base,nonn
%O A072427 0,2
%A A072427 Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jun 17 2002

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