%I #2 Mar 30 2012 19:00:22
%S 9,90,900,9000,90000,900000,7000000,90000000,900000000,90000000000,0,
%T 900000000000,0,70000000000000,900000000000000
%N a(n) = the largest n-digit number ending in n-1 zeros that is divisible by n, else 0.
%C See A173478 - A173486.
%K nonn,base
%O 1,1
%A _Jaroslav Krizek_, Feb 19 2010