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%I #2 Mar 30 2012 19:00:22
%S 1,10,300,1000,10000,300000,7000000,10000000,900000000,1000000000,
%T 110000000000,300000000000,13000000000000,70000000000000,
%U 300000000000000
%N a(n) = the smallest number ending in n-1 zeros divisible by n.
%C See A173478 - A173486.
%K nonn
%O 1,2
%A _Jaroslav Krizek_, Mar 04 2010