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a(n) = the smallest (n+2)-digit number ending in n+1 zeros that is divisible by n, else 0.
0

%I #2 Mar 30 2012 19:00:22

%S 100,1000,30000,100000,1000000,30000000,700000000,1000000000,

%T 90000000000,100000000000,0,30000000000000,0,7000000000000000,

%U 30000000000000000

%N a(n) = the smallest (n+2)-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