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A164808
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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.
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0
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-1, 0, 3, 11, 7, 15, 14, 17, 23, 17, 27, 43, 37, 47, 57, 117, 127, 143, 137, 147, 157, 243, 237, 247, 257, 357, 447, 457
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listen;
history;
text;
internal format)
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