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%I #2 Mar 31 2012 14:00:43
%S -1,0,3,11,7,15,14,17,23,17,27,43,37,47,57,117,127,143,137,147,157,
%T 243,237,247,257,357,447,457
%N a(n) = smallest number which has in its Spanish name the letter "e" in the n-th position,or -1 if no such number exists.
%C a(2)=cEro, a(3)=trEs, a(4)=oncE
%K word,sign
%O 1,3
%A _Claudio Meller_, Aug 26 2009
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