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%I #4 Mar 30 2012 19:00:22
%S 1,1,1,1,5,3,7,4,3,5,11,3,13,7,5,16,17,2,19,2,21,2,23,24,25,26,9,7,29,
%T 15,31,16,11,34,7,12,37,19,39,5,41,21,43,22,5,23,47,8,49,50
%N Denominator of (n-th nonprime/n).
%C Denominator of (A018252(n)/n).
%K nonn,frac,easy
%O 1,5
%A _Jaroslav Krizek_, Dec 11 2009