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a(n) = smallest number which has in its Spanish name the letter "l" in the n-th position, or -1 if no such number exists.
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%I #2 Mar 31 2012 14:00:43

%S -1,-1,1000,-1,1000000,2000,3000,5000,4000,14000,21000,16000,17000,

%T 25000,24000,35000,34000,44000,54000

%N a(n) = smallest number which has in its Spanish name the letter "l" in the n-th position, or -1 if no such number exists.

%C a(3)=miL, a(5)=un miLlon, a(6)=dos miL, a(7)= tres miL

%K word,sign

%O 1,3

%A _Claudio Meller_, Aug 26 2009