login
Largest n-digit number m such that m and m^10 are zeroless.
0

%I #2 Mar 31 2012 14:40:13

%S 7,92,992,9924,99556,999572,9998693,99996927,999985976,9999957996,

%T 99999789966,999999779234,9999998979517,99999997832434,

%U 999999992914885,9999999982155956

%N Largest n-digit number m such that m and m^10 are zeroless.

%K base,nonn

%O 1,1

%A _Zak Seidov_, Dec 22 2006