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%I #9 Mar 31 2012 10:26:07
%S 2,15,165,1639,16447,164499,1644919,16449370,164493391,1644934082,
%T 16449340710,164493406181,1644934067513,16449340668749,
%U 164493406685661,1644934066850411,16449340668485217,164493406684817903,1644934066848209911
%N 10^n-th squarefree number.
%C a(n)=A005117(10^n) with offset 0.
%D J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 165, pp 53, Ellipses, Paris 2008.
%Y Cf. A005117.
%K nonn
%O 0,1
%A _Lekraj Beedassy_, Jul 15 2008
%E a(10)-a(12) from _Donovan Johnson_, Nov 06 2010
%E a(13)-a(18) from _Robert Gerbicz_, Nov 22 2010
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