Search: id:A061674
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%I A061674
%S A061674 1,1,1,1,1,1,1,1,1,1,1,1,5,38,5,2,5,16,5,9,1,12,1,7,25,2,19,37,9,8,1,
%T A061674 14,25,1,8,2,7,3,13,15,1,16,6,23,1,2,9,3,44,7,1,19,13,4,185,1,11,3,4,
%U A061674 13,1,442,7,4,33,9,1,11,4,6,1,845,35,4,3,4,65,1,11,6,1,12345679,8,9,3
%N A061674 Smallest k such that k*n is a palindrome or becomes a palindrome when 
               0's are added on the left.
%C A061674 Every positive integer is a factor of a palindrome, unless it is a multiple 
               of 10 (D. G. Radcliffe, see Links).
%H A061674 P. De Geest, <a href="http://www.worldofnumbers.com/em36.htm">Smallest 
               multipliers to make a number palindromic</a>.
%e A061674 a(12) = 5 since 5*12 = 60 (i.e. 060) is a palindrome.
%o A061674 (ARIBAS): stop := 50000000; for n := 0 to 100 do k := 1; test := true; 
               while test and k < stop do m := omit_trailzeros(n*k); if test := 
               m <> int_reverse(m) then inc(k); end; end; if k < stop then write(k,
               " "); else write(-1," "); end; end;
%Y A061674 Cf. A050782, A062293. Values of k*n are given in A062279.
%Y A061674 Sequence in context: A089795 A081971 A086877 this_sequence A097276 A145156 
               A163698
%Y A061674 Adjacent sequences: A061671 A061672 A061673 this_sequence A061675 A061676 
               A061677
%K A061674 nonn,base,easy,nice
%O A061674 0,13
%A A061674 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jun 17 2001

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