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A164811
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a(n) = smallest number which has in its Spanish name the letter "a" in the n-th position, or -1 if no such number exists.
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0
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-1, 14, 4, -1, 1014, 1004, 30, 40, 24, 1030, 34, 44, 54, 140, 124, 404, 134, 144, 154, 324, 234, 244, 254, 354, 444, 454, 1354, 1444, 1454, 2354, 2444, 2454, 3454, 4444, 4454
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