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%I #8 Oct 03 2014 11:22:41
%S 7,97,998,9998,99998,999997,9999998,99999998,999999998,9999999998,
%T 99999999998,999999999998,9999999999998,99999999999998,
%U 999999999999998,9999999999999998,99999999999999998,999999999999999998
%N Largest n-digit squarefree number.
%t Table[x = 10^n; k = -1; While[! SquareFreeQ[y = x + k], k += -1]; y, {n, 18}] (* _Jayanta Basu_, Aug 01 2013 *)
%Y Cf. A074109.
%K base,nonn
%O 1,1
%A _Amarnath Murthy_, Aug 26 2002
%E More terms from _Matthew Conroy_, Aug 27 2002